ML20203N012

Forwards Request for Addl Info Re Atmospheric Dump Valve Control Sys Design to Be Implemented at Facility.Info Requested within 1 Wk of Receipt of Ltr to Meet June 30 Fuel Load Date Schedule

ML20203N012
Person / Time
Site:	Seabrook
Issue date:	04/28/1986
From:	Nerses V Office of Nuclear Reactor Regulation
To:	Harrison R PUBLIC SERVICE CO. OF NEW HAMPSHIRE
References
NUDOCS 8605020399
Download: ML20203N012 (8)

Text

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APR 2 8 300 Docket Nos.:

50-443 and 50-444 Mr. Robert J. Parrison President & Chief Executive Officer Public Service Company of New Hampshire P.O. Box 330 Manchester, NP 03105

SUBJECT:

SEABROOK - REQUESTS FOR ADDITIONAI. INFORMATION REl.ATED TO THE INSTRUMENTATION AND CONTROL DESIGN The purpose of this letter is to forward the enclosed request for additional information related to the atmospheric dump valve control system design to be implemented at Seabrook.

Subsequent to staff approval of a manual control system associated with electrohydraulic actuator operated atmospheric dump valves (ADVs), the Public Service. Company of New Hampshire (PSNP) elected to modify the desigr by providing air operated ADVs with safety-related backup air (gas bottles) systems and controls.

PSNP provided information by letter dated February 14, 1986 to describe the latest design. Powever, upon review, the staff has concluded that the information is insufficient and, thus, the staff is not-able to complete the review for this issue. The information identified in the enclosure is required for staff review before this item can be resolved.

I would appreciate you providing me your response within a week after receipt of this letter. This expedited schedule is necessary if we are to meet a June 30 fuel load date.

Questions or additional information regarding this matter should be directed to the Seabrook Project Manager, Mr. V. Nerses, (301) 492-8535).

Victor Nerses, Project Manager PWR Project Directorate No. 5 Division of PWR I.icensing-B

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APR 28 306 Docket Nos.:

50-443 and 50-444 Mr. Robert J. Parrison President & Chief Executive Officer Public Service Company of New Hampshire P.O. Box 330 Manchester, NP 03105

SUBJECT:

SEABROOK - REQUESTS FOR ADDITIONAL INFORMATION RELATED T0 j

THE INSTRUMENTATION AND CONTROL DESIGN I

The purpose of this letter is to forward the enclosed request for additional

4 information related to the atmospheric dump valve control system design to be l

implemented at Seabrook.

Subsequent to staff approval of a manual control system associated with electrohydraulic actuator operated atmospheric dump valves (ADVs), the Public Service Company of New Hampshire (PSNP) elected to modify the design by) providing air operated ADVs with safety-related backup air (gas bottles systems ano controls.

PSNP provided information by letter dated February 14, 1986 to describe the latest design. Powever, upon review, the staff has concluded that the information is insufficient and, thus, the staff is not able to complete the review for this issue. The information identified in the l

enclosure is required for staff review before this item can be resolved.

I would appreciate you providing me your response within a week after receipt of this letter. This expedited schedule is necessary if we are to meet a June 30 i

fuel load date.

i Questions or additional information regarding this matter should be directed to the Seabrook Project Manager, Mr. V. Nerses, (301) 492-8535).

Victor Nerses, Project Manager i

PWR Project Directorate No. 5 Division of PWR I.icensing-B

Enclosure:

As stated cc: See next page

h Mr. Robert J. Harrison Public Service Company of New Pampshire Seabrook Nuclear Power Station cc:

Thomas Dignan, Esq.

E. Tupper Kinder, Esq.

John A. Ritscher, Esq.

G. Dana Bisbee, Esq.

Ropes and Gray Assistant Attorney General 225 Franklin Street Office of Attorney General Boston, Massachusetts 02110 208 State Posue Annex Concord, New Hampshire 03301 Mr. Bruce B. Beckley, Project Manager Public Service Company of New Hampshire Resident Inspector Post Office Box 330 Seabrook Nuclear Power Station Manchester, New Hampshire 03105 c/o US Nuclear Regulatory Commission Post Office Box 700 Dr. Mauray Tye, President Seabrook, New Hampshire 03874 Sun Valley Association 209 Summer Street Mr. John DeVincentis, Director Haverhill, Massachusetts 01839 Engineering and licensing Yankee Atomic Electric Company Robert A. Backus, Esq.

1671 Worchester Road O'Neil, Backus and Spielman

.Framingham, Massachusetts 01701 j

116 lowell Street Manchester, New Hampshire 03105 Mr. A. M. Ebner, Project Manager United Engineers & Constructors William S. Jordan, III 30 South 17th Street Diane Curran Post Office Box 8223 Parmon, Weiss & Jordan Philadelphia, Pennsylvania 19101 20001 S Street, NW Suite 430 Washington, D.C.

20009 Mr. Philip Ahrens, Esq.

Assistant Attorney General State House, Station #6 Augusta, Maine 04333 Jo Ann Shotwell, Esq.

Office of the Assistant Attorney General Environmental Protection Division Mr. Warren Hall One Ashburton Place Public Service Company of Boston, Massachusetts 02108 New Hampshire Post Office Box 330 D. Pierre G. Cameron, Jr., Esq.

Seabrook, New Hampshire 03874 General Counsel Public Service Company of New Hampshire Seacoast Anti-Pollution league Post Office Box 330 Ms. Jane Doughty Manchester, New Hampshire 03105 5 Market Street Portsmouth, New Hampshire 03801 Regional Administrator, Region I U.S. Nuclear Regulatory Commission Mr. Diana P. Randall 631 Park Avenue 70 Collins Street King of Prussia, Pennsylvania 19406 Seabrook, New Hampshire 03874 hichard Pampe, Esq.

New Hampshire Civil Defense Agency 107 Pleasant Street Concord, New Hampshire 03301

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Public Service Company of Seabrook Nuclear Power Station New Fampshire cc:

Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent, City Fall Chairman 126 Daniel Street Board of Selectmen Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950 Ms. I.etty Pett Senator Gordon J. Pumphrey Town of Brentwood ATTN: Tom Burack i

RFD Dalton Road U.S. Senate Brentwood, New Hampshire 03833 Washington, D.C.

20510 Ms. Roberta C. Pevear Mr. Owen B. Durgin, Chairman Town of Hampton Falls, New Fampshire Durham Board of Selectmen Drinkwater Road Town of Durham Hampton Falls, New Fampshire 03844 Durham, New Hampshire 03824 Ms. Sandra Gavutis Charles Cross, Esq.

Town of Kensington, New Hampshire Shaines, Mardrigan and RDF 1 McEaschern East Kingston, New Fampshire 03827 25 Maplewood Avenue Post Office Box 366 Portsmouth, New Fampshire 03801 Chairman, Board of Selectmen RFD 2 South Pampton, New Hampshire 03827 Mr. Guy Chichester, Chaiman Rye Nuclear Intervention Mr. Angie Machiros, Chairman Committee Board of Selectmen c/o Rye Town Pall for the Town of Newbury 10 Central Road Newbury, F,assachusetts 01950 Rye, New Pampshire 03870 Ms. Cashman, Chairman Jane Spector Board of Selectmen Federal Energy Regulatory Town of Amesbury Commission Town Pall 825 North Capital Street, NE Amesbury, Massachusetts 01913 Room 8105 Washington, D. C.

20426 Ponorable Peter J. Matthews Mayor, City of Newburyport Mr. R. Sweeney Office of the Mayor New Hampshire Yankee Division City Fall Public Service of New Hampshire Newburyport, Massachusetts 01950 Company 7910 Woodmont Avenue Mr. Donald E. Chick, Town Manager Bethesda, Maryland 20814 Town of Exeter 10 Front Street Mr. William B. Derrickson i

Exeter, New Fampshire 03823 Senior Vice President Public Service Company of New Fampshire Post Office Box 700, Route 1 Seabrook, New Hampshire 03874

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I ENCLOSURE SEABROOK REQUEST FOR ADDITIONAL INFORMATION The information provided to date is insufficient to allow the staff to complete its review associated with the atmospheric duip valves (ADVs). Additional information should be provided on the backup safety-related air supply system and the safety-related control system.

The following should be provided as a minimum:

1.

Information on the technical specification requirements to be implemented for the safety-related portion of the design (include a discussion on the provisions provided for surveillance testing of the ADVs and associated safety-related manual controls including the design features used for isolation from the nonsafety-related portion of the system).

2.

Information on the failure modes and effects associated with the Train A and Train B solenoid operated valves utilized to control operation of the ADVs. This should show as a minimum:

That the capability of the subject valves to perfom the required safety functions (open/close as required for safe plant shutdown) cannot be degraded below an acceptable level as a result of all possible circumstances (i.e., overvoltage, undervoltage, etc.)

associated with the power supply to these valves. The main concern is with solenoid valves that are continuously energized during nomal plant operation.

- That the atmospheric dump valves fail to the closed position on loss of power.

That at least two (2) ADVs will be available for safe plant shutdown after assuming a single failure, and

- That the nonsafety-related positioner will be isolated when required.

3.

A complete set of drawings (electrical schematics, logics, switch development tables, etc.) which show the latest design implementation associated with the ADVs.

s k 4.

Information on the design criteria associated with the mechanical aspects of the backup air supply system (bottles, tubing, valves, etc.).

Include details on the control room indications available for the operator to verify operability of the backup air supply system.

5.

Information detailing the actuator design associated with the ADVs.

6.

Information on the safety-related backup air system as related to the following concern.

FSAR Section 7.3.2.3 implies that the safety-related backup air system may not have sufficient capacity to ensure that the necesfary equipment is maintained in service to allow operation at hot standby for at least four hours and the additional time required for It is cooldown to conditions permitting (operation of the RHR system.nonsafety-relate stated that the plant air system loaded onto the diesel generator bus, or that local manual control will be established.

Information is required to detail how this planned operation complies with the requirements of Branch Technical Position RSB 5-1, items A.1 and A. 3.

Details of the operator actions necessary for the operation of the ADVs for safe plant shutdown should be provided including identification of all deviations from the subject BTP requirements.

Justification information for each identified deviation should be provided.

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4 i

s ENCLOSURE SEABROOK REQUEST FOR ADDITIONAL INFORMATION The information provided to date is insufficient to allow the staff to complete its review associated with the atmospheric dump valves (ADVs). Additional infomation should be provided on the backup safety-related air supply system and the sa~fety-related control system. The following should be provided as a minimum:

1.

Infomation on the technical specification requirements to be implemented for the safety-related portion of the design (include a discussion on the provisions provided for survaillance testing of the ADVs and associated safety-related manual controls including the design features used for isolation from the nonsafety-related portion of the system).

2.

Information on the failure modes and effects associated with the Train A and Train B solenoid operated valves utilized to control operation of the ADVs. This should show as a minimum:

That the capability of the subject valves to perform the required safety functions (open/close as required for safe plant shutdown) cannot be degraded below an acceptable level as a result of all possible circumstances (i.e., overvoltage, undervoltage, etc.)

associated with the power supply to these valves. The main concern is with solencid valves that are continuously energized during normal plant operation.

- That the atmospheric dump valves fail to the closed position on loss of power, That at least two (2) ADVs will be available for safe plant shutdown after assuming a single failure, and

- That the nonsafety-related positioner will be isolated when required.

3.

'A complete set of drawings (electrical schematics, logics, switch development tables, etc.) which show the latest design implementation associated with the ADVs.

4 l

s 4.

Information on the design criteria associated with the mechanical aspects of the backup air supply system (bottles, tubing, valves, etc.).

Include details on the control room indications available for the operator to verify operability of the backup air supply system.

5.

Information detailing the actuator design associated with the ADVs.

6.

Information on the safety-related backup air system as related to the following concern. FSAR Section 7.3.2.3 implies that the safety-related backug air system may not have sufficient capacity to ensure that the necessary equipment is maintained in service to allow operation at hot l

standby for at least four hours and the additional time required for It is cooldown to conditions permitting (operation of the RHR system.nonsafety-relate stated that the pla'nt air system loaded onto the diesel generator bus, or that local manual control will be established.

Information is required to detail how this planned operation complies with the requirements of Branch Technical Position RSB 5-1, items A.1 and A. 3.

Details of the operator actions necessary for the operation of the ADVs for safe plant shutdown should be provided including i

identification of all deviations from the subject BTP requirements.

Justification information for each identified deviation should be provided.

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