HISTORIC AMERICAN ENGINEERING RECORD HAER No. CT-185-1lcweb2.loc.gov/master/pnp/habshaer/ct/ct0700/ct0716/data/ct0716data.pdf · HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERATOR

HISTORIC AMERICAN ENGINEERING RECORD

HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERATOR BUILDING (Connecticut Yankee Nuclear Power Plant, New Generator Building)

'

Location:

362 Injun Hollow

Road

I HAER No. CT-185-1

On Injttn Ilollo vv Road, approxima:tely 2 miles sol:l-theast of imers0ction ~ ith Roek LMdiag Road, and 170 feet Horth.east of Connecticut River. Haddam Middlesex County Connecticut

U.S. Geological Survey Haddam & Deep River Quadrangles UTM Coordinates 18.708748.4595057

Dates of Construction: 1969-1970

Engineers:

Present Owners:

Present Use:

Significance:

Westinghouse Electric Company

·Connecticut Yankee Atomic Power Company (CY APCO) 3 62 Injun Hollow Road Haddam Neck CT 06424-3022

Demolished

The Haddam Neck Nuclear Power Plant was one of the earliest commercial-scale nuclear power stations in the United States, and was eligible for the National Register of Historic Places. The New Diesel Generator Building provided back-up power for some Engineered Safety Systems, the Service Water pumps, and 4160/480V stepdown transformers.

Project Information: CY APCO ceased electrical generation at the Haddam Neck plant in 1996 and initiated decommissioning operations in 1998, subject to authority of the Nuclear Regulatory Commission (NRC). NRC authority brought the project under the purview of federal acts and regulation protecting significant cultural resources from adverse project effects. a This documentation was requested by the Connecticut State Historic Preservation Office to preclude the possibility of any adverse project effects.

,, National Historic Preservation Act of 1966 (PL 89-655), the National Environmental Policy Act of 1969 (PL 91-190), the Archaeological and Historical Preservation Act (PL 93-291), Executive Order 11593, Procedures for the Protection of Historic and Cultural Properties (36 CFR Part 800).

HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERATOR BUILDING (Connecticut Yankee Nuclear Power Plant, New Diesel Generator Building)

HAER No. CT-185-I (Page 2)

Proiect Manager and Historian Michael S. Raber Raber Associates 81 Dayton Road, P.O. Box 46 South Glastonbury, CT 06073 860/633-9026

Nuclear Steam Supply System Historian Gerald Weinstein Photo Recording Associates 40 West 77th Street, Apt. 17b New York, NY 10024 212/431-6100

Industrial Archaeologist Robert C. Stewart Historical Technologies 1230 Copper Hill Road West Suffield, CT 06093 860/668-2928


HAER No. CT -185-1 (Page 3)

The New Diesel Generator Building

As originally constructed, the Connecticut Yankee Haddam Neck plant included a Diesel Generator Building equipped with three 400-kW diesel generators to provide back-up power for some Reactor Containment Engineering Safety Systems. By 1970, the original back-up facility was replaced by the New Diesel Generator Building, built immediately to the southwest with almost five times the capacity. The 20.8-foot-high reinforced-concrete structure had 2-foot thick exterior walls, and consisted of a 57.8-by-45-foot room with two lTIuffler-equipped diesel generators (Nos. 2A and 2B) and a 31.3-by-29-foot annex with switchgear. The engine generators were separated by a 12-inch-thick concrete wall. Flood doors, float alarms, fire protection, and ventilation facilities were included (Figures 1-4). 1

New Diesel Generator Building equipment supplied power to the High and Low Pressure Safety Injection Pumps and Charging Pump components of the Emergency Core Cooling System for Reactor Containment, the Service Water pumps in the Screen House, 4160/480V step-down transformers and the Containment Air Recirculation fans (see HAER Nos. CT-185, CT-185-A, and CT-185-B)? The prime movers were General Motors type 645, twentycylinder, two-cycle, 3950-hp turbo-charged diesel engines, direct connected to 2850-kW, 3250-KV A, 4160V AC generators? The basic prime mover was developed by the Electromotive Corporation (later the Electromotive Division of General Motors, EMD) during the 1930s to power lightweight streamlined trains. By the mid 1960s this type of unit was a very common power supply for diesel locomotives, work boats, and stationary plants.

If there was an interruption of power on the 4160V service (which ran the plant's larger electric motors) or of the 115kV power coming into the plant, the engine generators came on automatically. Each unit would start when sensors noted a loss of AC power on the respective bus, or when a safety injection signal was received. The engine generators could take the load within 30 seconds from start. The generator feeds were redundant; each supplying a separate emergency bus to the safeguard equipment. Secure DC control of those buses came from the A and B switchgear batteries, located respectively in the Service and Switchgear buildings.4

All the specified safeguards could be run by one of the generator units, with the other serving as a back-up. There was local control for testing and operation if the control room had to be evacuated.5 To insure reliability, the starting functions were completely independent from the incoming electric power. Each engine was started by redundant initiation relay trains activating compressed-air-powered starting motors, supplied by banks of six air cylinders. Each engine had a base-mounted fuel tank sufficient for two hours of operation, and could be re-fueled from nearby underground 5,000 gallon tanks by pumps powered from the redundant 480V emergency bus in the switchgear facilities of the Service and Switchgear Buildings. Personnel on each shift performed local checks as did the control room operators from the auxiliary boards.

HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERA TOR BUILDING (Connecticut Yankee Nuclear Power Plant, New Diesel Generator Building)

HAER No. CT-185-1 (Page 4)

Failures of the generators and systems "frequently" occurred during testing, and during a refueling in 1984 the 115k V incoming power completely failed but one of the generators failed to connect to its bus. As a result of these incidents, diagnostics were added to the engines and increased maintenance procedures were added to the engines and switchgear. 6

In 1994, a manually-operated, electric-started, Caterpillar sixteen-cylinder, four-cycle, 2520-hp, 2180-kW diesel generator (EG-7) was added to the backup system to meet new NRC requirements for station blackout. lO This third engine generator was contained in a trailerlllovable container sited between the Waste Disposal Building and the Switchgear building (Figure 1). The unit had its own 1000 - gallon fuel oil tank sufficient for eight hours of operation? EG-7 had an air-cooled radiator, and anti-freeze-cooled engine cylinders typical of contemporary large Caterpillar engine generators. 8 The unit was installed to energize equipment supporting plant operation if the 115-kV line and one or both of the main back-up generators were lost. Its capacity was not equal to one of the EMD units. The temporary trailer installation was permanently installed c 1996, and EG-7 remained in service through plant decommissioning, again mounted on a temporary trailer installation. 9

Other diesel generators used on site were for the electric powered fire pump (EG-FP), the security systems (EG-SEC), the Emergency Operations Facility and the Spent Fuel Island. 10


HAER No. CT-185-1 (Page 5)

SOURCES OF INFORMA TIONIBIBLIOGRAPHY

A. Engineering Drawings

Drawings are archived as part of the Connecticut Yankee Atomic Power Company, Haddam Neck Plant Records Collection, Archives & Special Collections, Thomas J. Dodd Research Center, University of Connecticut Libraries.

Connecticut Yankee Atomic Power Company/Stone & Webster Engineering Corp. 1969-1988 Arrgt. New Diesel Gen. Bldg. Sheet 1. Nuclear Power Plant - Unit No.1.

No. 16103-27075 - Sh. 1.

1969-1976 Arrgt. New Diesel Gen. Bldg. Sheet 1. Nuclear Power Plant - Unit No. 1. No. 16103-27075 - Sh. 2.

B. Historic Views

A number of photographs showing HAER No. CT-185-C are archived as part of the Connecticut Yankee Atomic Power Company, Haddam Neck Plant Records Collection, Archives & Special Collections, Thomas J. Dodd Research Center, University of Connecticut

C. Bibliography

Connecticut Yankee Atomic Power Company and Northeast Utilities sources are archived as part of the Connecticut Yankee Atomic Power Company, Haddam Neck Plant Records Collection, Archives & Special Collections, Thomas J. Dodd Research Center, University of Connecticut Libraries.

Connecticut Yankee Atomic Power Company (CY APCO) 1966-1974 Facility Description and Safety Analysis (FDSA) Vol. 1. Topical

Report No. NYO-32S0-S. Neck Plant, Haddam, Connecticut.

1987-1993

1994

Connecticut Yankee Plant Information Book. 15 vols.

Permanent Installation of Air-Cooled Diesel EG-7. Plant Design Change Record (PDCR) 889, Project Assignment 91-014. Various Reports, Memos, Letters.

1998 Decommissioning Updated Final Safety Analysis Report (UFSAR). 3 vals. van Noordennen, Gerard (CY APCO Regulatory Affairs Manager) 2008

Personal communications.

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HAER No. CT -185-1 (Page 10)

1 Connecticut Yankee Atomic Power Company 1966-1974: 9.5-1.

~ The fans are noted in Connecticut Yankee Atomic Power Company 1966-1974: 9.5-1 but not Connecticut Yankee Atomic Power Company 1987-1993: Chapter 72, page 3.

J Connecticut Yankee Atomic Power Company 1987-1993: Chapter 72, page 2.

,I Ibid: page 67.

:1 Ibid: page 105.

I) Ibid: pages 193-4.

Connecticut Yankee Atomic Power Company 1966-1974: 8.3-17.

:1 Ibid: 8.3-12,8.3-17; Connecticut Yankee Atomic Power Company 1995-1996; personal communications, Gerald van Noordennen 2008.

9 Connecticut Yankee Atomic Power Company 1995-1996; personal communications, Gerard van Noordennen 2008.

10 CY APCO Letter (CY-00-046) to the CT Department of Environmental Protection, PreInspection Questionnaire, dated March 30, 2000.

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WRITTEN HISTORICAL AND DESCRIPTIVE DATA

HAER CT-185-IHAER CT-185-I

ADDENDUM TO:HADDAM NECK NUCLEAR POWER PLANT, NEW DIESELGENERATOR BUILDING(Connecticut Yankee Nuclear Power Plant, New Diesel GeneratorBuilding)362 Injun Hollow RoadHaddamMiddlesex CountyConnecticut

HISTORIC AMERICAN ENGINEERING RECORDNational Park Service

U.S. Department of the Interior1849 C Street NW

Washington, DC 20240-0001

ADDENDUM TO HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERATOR BUILDING

(Connecticut Yankee Nuclear Power Plant, New Diesel Generator Building) HAER No. CT-185-I

(Page 10)

HISTORIC AMERICAN ENGINEERING RECORD

HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERATOR BUILDING (Connecticut Yankee Nuclear Power Plant, New Generator Building)

This report is an addendum to a 9-page report previously transmitted to the Library of Congress in 2010. Location: 362 Injun Hollow Road Haddam Middlesex County Connecticut U.S. Geological Survey Haddam & Deep River Quadrangles UTM Coordinates 18.708748.4595057 Dates of Construction: 1969-1970 Engineers: Westinghouse Electric Company Present Owners: Connecticut Yankee Atomic Power Company (CYAPCO) 362 Injun Hollow Road Haddam Neck CT 06424-3022 Present Use: Demolished Significance: The Haddam Neck Nuclear Power Plant was one of the earliest commercial-scale

nuclear power stations in the United States, and was eligible for the National Register of Historic Places. The New Diesel Generator Building provided back-up power for some Engineered Safety Systems, the Service Water pumps, and 4160/480V stepdown transformers.

Project Information: CYAPCO ceased electrical generation at the Haddam Neck plant in 1996 and

initiated decommissioning operations in 1998, subject to authority of the Nuclear Regulatory Commission (NRC). NRC authority brought the project under the purview of federal acts and regulation protecting significant cultural resources from adverse project effects.i This documentation was requested by the Connecticut State Historic Preservation Office to preclude the possibility of any adverse project effects.

i National Historic Preservation Act of 1966 (PL 89-655), the National Environmental Policy Act of 1969 (PL 91-190), the Archaeological and Historical Preservation Act (PL 93-291), Executive Order 11593, Procedures for the Protection of Historic and Cultural Properties (36 CFR Part 800).



(Page 11) Project Manager and Historian Michael S. Raber Raber Associates 81 Dayton Road, P.O. Box 46 South Glastonbury, CT 06073 860/633-9026 Nuclear, Steam and Electric Power Historian Gerald Weinstein Photo Recording Associates 40 West 77th Street, Apt. 17b New York, NY 10024 212/431-6100 Industrial Archaeologist Robert C. Stewart Historical Technologies 1230 Copper Hill Road West Suffield, CT 06093 860/668-2928



(Page 12) The New Diesel Generator Building As originally constructed, the Connecticut Yankee Haddam Neck plant included a Diesel Generator Building (HAER No. CT-185-H) equipped with three 400-kW diesel generators to provide back-up power for some Reactor Containment Engineering Safety Systems. By 1970, the original back-up facility was replaced by the New Diesel Generator Building, built immediately to the southwest with almost five times the capacity. The 20.8-foot-high reinforced-concrete structure had 2-foot thick exterior walls, and consisted of a 57.8-by-45-foot room with two muffler-equipped diesel generators (Nos. 2A and 2B) and a 31.3-by-29-foot annex with switchgear. The engine generators were separated by a 12-inch-thick concrete wall. Flood doors, float alarms, fire protection, and ventilation facilities were included (Figures1-4).1 New Diesel Generator Building equipment supplied power to the High and Low Pressure Safety Injection Pumps and Charging Pump components of the Emergency Core Cooling System for Reactor Containment, the Service Water pumps in the Screen House, 4160/480V step-down transformers and the Containment Air Recirculation fans.2 The prime movers were General Motors type 645, twenty-cylinder, two-cycle, 3950-hp turbo-charged diesel engines, direct connected to 2850-kW, 3250-KVA, 4160V AC generators.3 The basic prime mover was developed by the Electromotive Corporation (later the Electromotive Division of General Motors, EMD) during the 1930s to power lightweight streamlined trains. By the mid 1960s this type of unit was a very common power supply for diesel locomotives, work boats, and stationary plants. If there was an interruption of power on the 4160V service (which ran the plant’s larger electric motors) or of the 115kV power coming into the plant, the engine generators came on automatically. Each unit would start when sensors noted a loss of AC power on the respective bus, or when a safety injection signal was received. The engine generators could take the load within 30 seconds from start. The generator feeds were redundant; each supplying a separate emergency bus to the safeguard equipment. Secure DC control of those buses came from the A and B switchgear batteries, located respectively in the Service and Switchgear buildings.4 All the specified safeguards could be run by one of the generator units, with the other serving as a back-up. There was local control for testing and operation if the control room had to be evacuated.5 To insure reliability, the starting functions were completely independent from the incoming electric power. Each engine was started by redundant initiation relay trains activating compressed-air-powered starting motors, supplied by banks of six air cylinders. Each engine had a base-mounted fuel tank sufficient for two hours of operation, and could be re-fueled from nearby underground 5,000 gallon tanks by pumps powered from the redundant 480V emergency bus in the switchgear facilities of the Service and Switchgear Buildings. Personnel on each shift performed local checks as did the control room operators from the auxiliary boards. Failures of the generators and systems “frequently” occurred during testing, and during a refueling in 1984 the 115kV incoming power completely failed but one of the generators failed to connect to its bus. As a result of these incidents, diagnostics were added to the engines and increased maintenance procedures were added to the engines and switchgear.6



(Page 13) In 1994, a manually-operated, electric-started, Caterpillar sixteen-cylinder, four-cycle, 2520-hp, 2180-kW diesel generator (EG-7) was added to the backup system to meet new NRC requirements for station blackout.10 This third engine generator was contained in a trailer-movable container sited between the Waste Disposal Building and the Switchgear building (Figure 1). The unit had its own 1000 - gallon fuel oil tank sufficient for eight hours of operation.7 EG-7 had an air-cooled radiator, and anti-freeze-cooled engine cylinders typical of contemporary large Caterpillar engine generators.8 The unit was installed to energize equipment supporting plant operation if the 115-kV line and one or both of the main back-up generators were lost. Its capacity was not equal to one of the EMD units. The temporary trailer installation was permanently installed c1996, and EG-7 remained in service through plant decommissioning, again mounted on a temporary trailer installation.9 Other diesel generators used on site were for the electric powered fire pump (EG-FP), the security systems (EG-SEC), the Emergency Operations Facility and the Spent Fuel Island. 10

NOTES

1 Connecticut Yankee Atomic Power Company 1966-1974: 9.5-1. 2 The fans are noted in Connecticut Yankee Atomic Power Company 1966-1974: 9.5-1 but not Connecticut Yankee Atomic Power Company 1987-1995: Chapter 72, page 3. 3 Connecticut Yankee Atomic Power Company 1987-1995: Chapter 72, page 2. 4 Ibid: page 67. 5 Ibid: page 105. 6 Ibid: pages 193-4. 7 Connecticut Yankee Atomic Power Company 1966-1974: 8.3-17. 8 Ibid: 8.3-12, 8.3-17; Connecticut Yankee Atomic Power Company 1995-1996; personal communications, Gerald van Noordennen 2008. 9 Connecticut Yankee Atomic Power Company 1995-1996; personal communications, Gerald van Noordennen 2008.

10 CYAPCO Letter (CY-00-046) to the CT Department of Environmental Protection, Pre-Inspection Questionnaire, dated March 30, 2000.



(Page 14) SOURCES OF INFORMATION/BIBLIOGRAPHY

A. Engineering Drawings Drawings are archived as part of the Connecticut Yankee Atomic Power Company, Haddam Neck Plant Records Collection, Series I, Archives & Special Collections, Thomas J. Dodd Research Center, University of Connecticut Libraries. Connecticut Yankee Atomic Power Company/Stone & Webster Engineering Corp. 1969-1988 Arrgt. New Diesel Gen. Bldg. Sheet 1. Nuclear Power Plant - Unit No. 1. No. 16103

27075 - Sh. 1.

1969-1976 Arrgt. New Diesel Gen. Bldg. Sheet 1. Nuclear Power Plant - Unit No. 1. No. 16103-27075 - Sh. 2.

B. Historic Views

A large number of Reactor Containment views are archived as part of the Connecticut Yankee Atomic Power Company, Haddam Neck Plant Records Collection, Series VI, Archives & Special Collections, Thomas J. Dodd Research Center, University of Connecticut Libraries. Major sets of views are noted below: Connecticut Yankee Atomic Power Company

n.d. [roughly chronological color photographs of plant construction and site views, 1964-1999] on archival CD with file name Haddam Neck Construction.pdf

C. Bibliography and Personal Communications

Connecticut Yankee Atomic Power Company and Northeast Utilities sources are archived as part of the Connecticut Yankee Atomic Power Company, Haddam Neck Plant Records Collection, Archives & Special Collections, Thomas J. Dodd Research Center, University of Connecticut Libraries. Connecticut Yankee Atomic Power Company (CYAPCO) 1966-1974 Facility Description and Safety Analysis (FDSA) Vol. 1. Topical Report No. NYO-3250-

5. Neck Plant, Haddam, Connecticut. 1987-1995 Connecticut Yankee Plant Information Book. 15 vols.

1994 Permanent Installation of Air-Cooled Diesel EG-7. Plant Design Change Record (PDCR)

889, Project Assignment 91-014. Various Reports, Memos, Letters. 1998 Decommissioning Updated Final Safety Analysis Report (UFSAR). 3 vols.

van Noordennen, Gerald (CYAPCO Regulatory Affairs Manager)

2008 Personal communications to Michael Raber and Gerald Weinstein.



(Page 15)

Figure 1. NEW DIESEL GENERATION BUILDING LOCATION AT MAIN PLANT AREA Source: Stone & Webster Drawing No. 10899-FY-1N



(Page 16)

Figure 2. 1970 VIEW EAST INCLUDING NEW DIESEL GENERATOR BUILDING (INDICATED BY ARROW), SCREEN WELL HOUSE (RIGHT), ADMINISTRATION AND TURBINE BUILDINGS (CENTER), SERVICE BUILDING (IMMEDIATELY LEFT OF TURBINE BUILDING), REACTOR CONTAINMENT (LEFT CENTER), AND PRIMARY AUXILIARY BUILDING (LEFT OF REACTOR CONTAINMENT)

Source: Connecticut Yankee Atomic Power Company n.d. [historic views]-Photo No. 240



(Page 17)



(Page 18)

Documents

HISTORIC AMERICAN ENGINEERING RECORD HAER No. CT-185-1lcweb2.loc.gov/master/pnp/habshaer/ct/ct0700/ct0716/data/ct0716data.pdf · HADDAM NECK NUCLEAR POWER PLANT, NEW DIESEL GENERATOR