ML20137A053

Forwards Request for Addl Info Re Adequacy of Probabilistic Arguments Presented at 851216 Meeting as Basis for Relaxing Tech Spec Limiting Conditions of Operation.Response Requested by 860128

ML20137A053
Person / Time
Site:	Seabrook
Issue date:	01/07/1986
From:	Nerses V Office of Nuclear Reactor Regulation
To:	Harrison R PUBLIC SERVICE CO. OF NEW HAMPSHIRE
References
NUDOCS 8601140130
Download: ML20137A053 (7)

Text

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Docket No.: 50-443 Mr. Robert J. Harrison President & Chief Executive Officer Public Service Company of New Hampshire Post Office Box 330 Manchester, New Hampshire 03105

SUBJECT:

TECHNICAL SPECIFICATION, REQUEST FOR ADDITIONAL INFORMATION During the week of December 16, 1985, NRC and Seabrook staff met to discuss

! comments on the draft Technical Specifications (TS). some of these discussions concerned the adequacy of the probabilistic arguments put forth by the Seabrook staff as a basis for relaxing certain TS Limiting Conditions of Operations. In particular, Mr. S. Israel of our staff informed Mr. K. Kiper of your staff of the specific information we need to complete our review of the probabilistic arguments. In a subsequent telephone call between these persons, additional information needed that had not been discussed during the December 16, 1985 meeting was identified.

For the record, enclosed is a list of additional information requested that covers the discussions during the meeting in the week of December 16, 1985 and the subsequent telephone call. To maintain our review schedule, please j provided us with your responses by January 28, 1986.

. If you cannot meet this schedule, please advise me within seven days upon j receipt of this letter as to what date you can meet.

Questions or additional information regarding this matter should be directed to the Seabrook Project Manager, Mr. V. Nerses (301-492-7238)

Victor Nerses, Project Manager

PWR Project Directorate #5 Division of PWR Licensing A

Enclosure:

As stated cc: See next page

! Distribution: "

' Docket; File: OELD

NRC PDR E. Jordan Local PDR B. Grimes PD#5 Reading File J. Partlow T. Novak V. Nerses M. Rushbrcok ACRS(10)

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0FFICIAL RECORD COPY i

UNITED STATES

{ v g NUCLEAR REGULATORY COMMISSION th :p WASHINGTON, D. C. 20555

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• g J4% 0? 1986 Docket No.: 50-443 Mr. Robert J. Harrison President & Chief Executive Officer Public Service Company of New Hampshire Post Office Box 330 Manchester, New Hampshire 03105

SUBJECT:

TECHNICAL SPECIFICATION, REQUEST FOR ADDITIONAL INFORMATION During the week of December 16, 1985, NRC and Seabrook staff met to discuss comments on the draft Technical Specifications (TS). some of these discussions concerned the adequacy of the probabilistic arguments put forth by the Seabrook staff as a basis for relaxing certain TS Limiting Conditions of Operations. In particular, Mr. S. Israel of our staff informed Mr. K. Kiper of your staff of the specific information we need to complete our review of the probabilistic arguments. In a subsequent telephone call between these

persons, additional infomation needed that had not been discussed during the December 16, 1985 meeting was identified.

For the record, enclosed is a list of additional information requested that covers the discussions during the meeting in the week of December 16, 1985 and the subsequent telephone call. To maintain our review schedule, please provided us with your responses by January 28, 1986.

If you cannot meet this schedule, please advise me within seven days upon -

receipt of this letter as to what date you can meet.

Questions or additional infomation regarding this matter should be directed to the Seabrook Project Manager, Mr. V. Nerses (301-492-7238) ictor Nerses, Project Manager PWR Project Directorate #5 Division of PWR Licensing-A

Enclosure:

As stated cc: See next page i

se i h

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J Mr. Robert J. Harrison Public Service Company of New Hampshire 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 Hosue 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 Comission Post Office Box 700 Dr. Mauray Tye, President Seabrook, New Hampshire 03874 Sun Valley Association 209 Sumer 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 116 Lowell Street Manchester, New Hampshire 03105 Mr. A. M. Ebner, Project Manager United Engineers & Constructors Ms. Beverly A. Hollingworth 30 South 17th Street 7 A Street Post Office Box 8223 Hampton Beach, New Hampshire 03842 Philadelphia, Pennsylvania 19101 William S. Jordan, III Mr. Philip Ahrens, Esq.

Diane Curran Assistant Attorney General Harmon, Weiss & Jordan State House, Station #6 20001 S Street, NW .., Augusta, Maine 04333 -

Suite 430

• Washington, DC 20009 Mr. Warren Hall Jo Ann Shotwell, Esq. Public Service Company of Office of the Assistant Attorney General New Hampshire Environmental Protection Division Post Office Box 330 One Ashburton Place Seabrook, New Hampshire 03874 Boston, Massachusetts 02108 Seacoast Anti-Pollution League D. Pierre G. Cameron, Jr., Esq. Ms. Jane Doughty General Counsel 5 Market Street Public Service Company of New Hampshire Portsmouth, New Hampshire 03801 Post Office Box 330 Manchester, New Hampshire 03105 Mr. Diana P. Randall 70 Collins Street Regional Administrator, Region I Seabrook, New Hampshire 03874 U.S. Nuclear Regulatory Comission 631 Park Avenue Richard Hampe, Esq.

King of Prussia, Pennsylvania 19406 New Hampshire Civil Defense Agency 107 Pleasant Street Concord, New Hampshire 03301 J

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

Mr. Calvin A. Canney, City Manager Mr. Alfred V. Sargent, City Hall Chairman 126 Daniel Street Board of Selectmen Portsmouth, New Hampshire 03801 Town of Salisbury, MA 01950

. Ms. Letty Hett Senator Gordon J. Humphrey Town of Brentwood ATTN: Tom Burack RFD Dalton Road U.S. Senate Brentwood, New Hampshire 03833 Washington, D.C. 20510 Ms. Roberta C. Pevear Senator Gordan J. Humphrey Town of Hampton Falls, New Hampshire ATTN: Herb Boynton Drinkwater Road 1 Pillsbury Street Hampton Falls, New Hampshire 03844 Concord, New Hampshire 03301 Ms. Sandra Gavutis Mr. Owen B. Durgin, Chairman Town of Kensington, New Hampshire Durham Board of Selectmen RDF 1 Town of Durham East Kingston, New Hampshire 03827 Durham, New Hampshire 03824 Charles Cross, Esq.

Chairman, Board of Selectmen Shaines, Mardrigan and Town Hall McEaschern South Hampton, New Hampshire 03827 25 Maplewood Avenue Post Office Box 366 Mr. Angie Machiros, Chairman Portsmouth, New Hampshire 03801 Board of Selectmen for the Town of Newbury Newbury, Massachusetts 01950 Mr. Guy Chichester, Chaiman Rye Nuclear Intervention Ms. Cashman, Chairman Committee Board of Selectmen c/o Rye Town Hall Town of Amesbury 10 Central Road Town Hall Rye, New Hampshire 03870 Amesbury, Massachusett's 01913 Jane Spector Honorable Richard E. Sullivan Federal Energy Regulatory Mayor, City of Newburyport Coninission Office of the Mayor 825 North Capital Street, NE City Hall Room 8105 Newburyport, Massachusetts 01950 Washington, D. C. 20426 Mr. Donald E. Chick, Town Manager Mr. R. Sweeney Town of Exeter New Hampshire Yankee Division 10 Front Street Public Service of New Hampshire l Exeter, New Hamp: hire 03823 Company 7910 Woodmont Avenue Mr. William B. Derrickson Bethesda, Maryland 20814 Senior Vice President Public Service Company of New Hampshire Post Office Box 700, Route 1 Seabrook, New Hampshire 03874

b Seabrook Station, Unit 1 Docket No. 50-443 Request for Additional Information Q1. 3.5.1.a Accumulators: The request for relaxation of the allowed outage time is not adequately supported. The PSA does not even include accumulator outage in the analysis. To evaluate the probabilistic significance of this change, we need:

1. A list of sequences that are affected by accumulator outages.

Each sequence should identify the events that make up the sequence and the quantification of each event. One event in each sequence would obviously be the unavailability of the accumulators.

2. Industry data on the frequency (per year) and duration of accumulator outages broken down by plant and year.

Q2. 3.5.5 RWST: There is no supporting documentation on RWST outages.

We need the following to evaluate this request:

1. An analysis which shows that the NPSH is adequate with 431,000 gallons in the RWST when there is a switchover from injection to recirculation with all pumps running following a large LOCA.

2. Reference to an analysis that shows that 1800 ppm boron is adequate to cover the spectrum of DBA's analyzed in the FSAR.

Q3. 3.5.2 ECCS Subsystems: The request for relaxation of the allowed outage time is not adequately supported. To evaluate the probabilistic significant of this change, we need:

1. List of components considered in a subsystem and the frequency, duration, and type of maintenance normally performed on each component.

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2. A list of sequences that are effected by the ECCS subsystem outages. Each sequence should identify the events that make up the sequence and the quantification of each event. One event in each sequence would obviously ha the unavailability of the ECCS subsystems.

3. Industry data on the frequency (per year) and duration of ECCS outages broken down by plant, year, and 3 or 7 day Tech Spec A0T.

Q4. 3.7.5 Ultimate Heat Sink: The request for relaxation of the allowed outage time for the cooling tower is not adequately supported. To evaluate the probabilistic significance of this change, we need:

1. A list of sequences that are affected by service water and cooling tower outages. Each sequence should identify the events that make up the sequence and the quantification of each event.

At least tw'o events in'each sequence would cover the service water

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and cooling tower outages and/or failure probabilities so that the staff can modify the quantification as deemed necessary.

2. Industry data on the frequency (per year) and duration of service water and/or cooling tower outages broken down by plant, year, and A0T of 7 days.

Q6. 3.8.1.1 Electric Power Systems: The request for relaxation of the availability of offsite power sources is not adequately supported. To evaluatetheprobabilisticsignificapceoftheproposedchange,weneed:

1. A list of sequences that are affected by the offsite power sources.

Each sequence should identify the events that make up the sequence 1

and the quantification of each event. One event in each sequence would obviously represent the unavailability of one of the offsite sources or associated onsite transformers.

2. Data on the frequency (per year) and duration of failure of offsite power sources broken down by line and year.

Q7. 3.8.1.1 Electric Power Systems: The request for relaxed testing schedule for diesel generators refers to Generic Letter 84-15 as a basis for the change. Also cited in this Generic Letter is a need for a reliability assurance program to maintain and improve the reliability of DGs. Provide a description of the reliability program you will implement in consideration of. Generic Letter 84-15.

08. 3/4.3.4 Turbine overspeed Protecticn Systan: Provide a copy of the nuclear power experience with the turbine valves and overspeed protection systen that was cited in ycur evaluation of the Technical Specificaticns for the Turbine overspeed Protection Systan.

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