ML20059N676

Discusses Extension of Due Date for Response to Station Blackout Rule from 901011 to 901102

ML20059N676
Person / Time
Site:	Byron, Braidwood
Issue date:	10/10/1990
From:	Schuster T COMMONWEALTH EDISON CO.
To:	Murley T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
TAC-68515, TAC-68516, TAC-68522, TAC-68523, NUDOCS 9010170129
Download: ML20059N676 (1)

Text

,

7 N Commonwealth Edison .

) 1400 Opus Plac)  ?

• $ a J Downers Crov3, Illinois 60515 i October 10, 1990 Dr. Thomas L. Murley l Office of Nuclear Reactor Regulation l U.S. Nuclear Regulatory Commission  !

Washington, DC 20555 Attn: Document Control Desk i

Subject:

Byron Station Units 1 and 2 Braldwood Station Units I and 2 Supplemental Response to the Station Blackout (SBO) Rule  :

NRC Docket Nos. 50-454/455 and 50-456/457

Reference:

a) August 6, 1990 letter from S.P. Sands to T.J. Kovach containing the Safety Evaluations for the Byron /

Braidwood responses to the SB0 Rule. TAC Nos:  !

68522, 68523, 68515 16 68516 i

Dear Dr. Murley:

The letter of Reference (a) requested a revised Byron /Braldwood response to the 5B0 rule, addressing the areas of non-conformance, be submitted within 60 days of letter receipt. In response to the concerns identified in the referenced safety evaluation and NRC staff clarifications provided to NUMARC in the months of April and June on the unacceptability of Non-Blacked Out Unit load shedding of any type Commonwealth Edison Company (CECO) revised its approach to resolving the SB0 rule for Byron /Braidwood l Stations.

The revised approach was presented to the NRC during a meeting between the NRC staff and Commonwealth Edison representatives on October 4, +

1990. During that meeting, the NRC staff commented that a level of detail  ;

commensurate with that presented at the meeting should be included in Ceco's revised response to the rule. Ceco is currently preparing the revised written

-response. It will likely require three additional weeks to prepare beyond the original due date of October 11, 1990. The staff indicated a short extension of the response due date to provide this level of detail was acceptable. The revised response to the SB0 rule for Byron /Braidwood Station will therefore be  ;

provided by November 2, 1990. t If you have any questions regarding this response, please direct them ,

to this office. '

9010170129 9o101o Respectfully.

PDR ADOCK 05000404'NU i P ,

T.K. Schuster oL}.yb 3

l J Nuclear Licensing Administrator ,

cc: Braidwood Resident Inspector Byron Resident Inspector T. Boyce - NRR S. Sands - NRR Region III Office gfp srm/338 tlU