ML20244C275

Forwards Draft Safety Evaluation Re Plant Compliance W/ 10CFR50.62, ATWS Rule. Requests Response to NRC Concerns Re Diversity & Testability of Alternate Rod Injection & Reactor Pump Trip Sys

ML20244C275
Person / Time
Site:	Pilgrim
Issue date:	06/06/1989
From:	Mcdonald D Office of Nuclear Reactor Regulation
To:	Bird R BOSTON EDISON CO.
Shared Package
ML20244C278	List: ML20244C275 ML20244C290
References
NUDOCS 8906140195
Download: ML20244C275 (3)

Text

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A UNITED STATES NUCLEAR REGULATORY COMMISSION

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WASHINGTON, D. C. 20555

\ . . . . . [l June 6,1989 Docket flo. 50-293 Mr. Ralph Bird Senior Vice President - Nuclear Boston Edison Company Pilgrim Nuclear Power Station RFD #1, Rocky Hill Road Plymouth, Massachusetts 02360

SUBJECT:

COMPLIANCE WITH ATWS RULE 10 CFR 50.62 The ATWS Rule (10 CFR 50.62, " Requirements for Reduction of Risk from Anticipated Transients Without Scram (ATWS) Events for Light-Water-Cooled Nuclear Power Plant") requires improvements in the design and operation of commercial nuclear power facilities to reduce the likelihood of failure to shut down the reactor following anticipated transients, and to mitigate the consequences of an ATWS event. The requirements for a boiling water reactor are to install an alterna u rod injection (ARI) system, a standby liquid control system (SLC) and to trip the reactor coolant recirculation pumps (RPT) automatically under conditions indicative of an ATWS.

By letter dated May 20, 1987, you requested Technical Specifications regarding the surveillance test frequency of the ATWS ARI/RPT instruments. The staff responded to your request and issued Amendment 121 to the Pilgrim Technical Specifications dated September 8, 1988. During the staff's review, a request for additional information (RAI) was sent by letter dated September 24, 1987.

Your response was provided by letter dated April 27, 1988.

The SLCS was found acceptable and the Technical Specifications issued in Amendment 102, dated August 5, 1987.

The staff is performing a post-implementation review of the ARI and RPT portions of the ATWS modifications to determine compliance with the ATWS rule. Your letters dated May 20, 1987, April 27, 1988, and the Pilgrim Final Safety Analysis Report provided the information uced for the staff's post-implementation review.

Concerns were identified in diversity and testability of the ARI/RPT and reset I of the ARI system. These concerns were addressed during a meeting in Rockville, l'aryland, on December 9,1988. The testability and reset concerns were resolved and the diversity concern for the ARl/RPT remains unresolved.

The details which support the staff's review and conclusions are included in the enclosed draft Safety Evaluatio,n (SE).

The NRC staff will provide additional guidance on the diversity issue shortly.

We request that you respond to the unresolved diversity concerns identified in the draft SE and provide a schedule for resolution when the additional NRC staff guidance is provided. g '

i 8906140190 890606 l PDR ADOCK 05000293 11 P PDC

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l Mr.' Ralph Bird -2 June 6,1989  !

The staff has noted that the existing technical specifications for the ARI/RPT - -

systems'are acceptable on an interim basis. Guidance will be provided on a generic basis at a later date and a determination made if changes are required to the curren_t Technical Specifications fore these systems. -

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L. 96 511.

Sincerely, L Original signed by:

Daniel G. Mcdonald, Jr.

Senior Project Manager Project Directorate I-3 Division of Reactor Projects I/II

Enclosure:

As stated cc w/ enclosure:

See next page Distribution:4AgehetfMie,50-293, NRC& Local PDRs, PDI-3 r/f, SVarga, BBoger, JWiggins, Region I, MRushbrook, DMcDonald, 0GC, EJordan, BGrimes, ACRS(10)

F . Li-SIC VDEST ,O NAME:R ho...k :P.c' Donald :Wessman :  :  : :

DATEb l ,:  :  : :

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OFFI;IAL RECORD COPY l

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l Mr. Ralph G. Bird Boston Edison Pilgrim Nuclear Power Station cc:

Mr. K. L. Highfill Mr. Ralph G. Bird Station Director Senior Vice President - Nuclear Pilgrim Nuclear Power Station Boston Edison Company RFD #1 Rocky Hill Road Pilgrim Nuclear Power Station Plymouth, Massachusetts 02360 RFD#1, Rocky Hill Road Plymouth, Massachusetts 02360 Resident Inspector's Office Mr. Richard N. Swanson, Manager U. S. Nuclear Regulatory Commission Nuclear Engineering Department Post Office Fox 867 Boston Edison Company Plymouth, Massachusetts 02360 25 Braintree Hill Park '

Braintree, Massachusetts 02184 Chairman, Board of Selectmen 11 Lincoln Street Ms. Elaine D. Robinson Plymouth, Massachusetts 02360 Nuclear Information Manager Pilgrim Nuclear Power Station Office of the Commissioner RFD #1, Rocky Hill Road Massachusetts Department of Plymouth, Massachusetts 02360 Environmental Quality Engineering One Winter Street Charles V. Barry l Boston, Massachusetts 02108 Secretary of Public Safety Executive Office of Public Safety Office of the Attorney General One Ashburton Place l One Ashburton Place Boston, Massachusetts 02108 20th Floor Bostoni, Massachusetts 02108 Mr. Robert M. Hallisey, Director Radiation Control Program Massachusetts Department of Public Health 150 Tremont Street, 2nd Floor Boston, Massachusetts 02111 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Mr. James D. Keyes Regulatory Affairs and Programs Group Leader Boston Edison Company 25 Braintree Hill Park Braintree, Massachusetts 02184 i

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