ML20134P068

Comment on Draft RG DG-1051, Monitoring Effectiveness of Maint at Npp

ML20134P068
Person / Time
Site:	Millstone, Haddam Neck  File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	11/14/1996
From:	Feigenbaum T NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
FRN-61FR47987, RTR-REGGD-XX.XXX, TASK-*****, TASK-RE 61FR47987-00003, 61FR47987-3, NUDOCS 9611270222
Download: ML20134P068 (2)

Text

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November 14,1996 USNhc "

Docket Nos. 50-213 50-245-50-336 50-423 B15997 1

l Rules Review and Directives Branch, DFIPS Office of Administration U.S. Nuclear Regulatory Commission Washington, DC 20555 Millstone Nuclear Power Station, Unit Nos.1,2 and 3 Haddam Neck Plant Comments on Draft Regulatory Guide DG-1051, i

Monitorina the Effectiveness of Maintenance at Nuclear Power Plants The Nuclear Regulatory Commission (NRC) issued Draft Regulatory Guide DG-1051,

" Monitoring the Effectiveness of Maintenance at Nuclear Power Plants," for review and comment in August,1996. Draft Regulatory Guide DG-1051 is a proposed Revision 2 to Regulatory Guide 1.160. This letter transmits comments on Draft Regulatory Guide DG-1051 on behalf of Northeast Nuclear Energy Company (NNECO) and Connecticut Yankee Atomic Power Company (CYAPCO) for Mi'Istone Unit Nos.1, 2 and 3, and i

Haddam Neck Plant, respectively.

Millstone Unit Nos.1,2 and 3, and Haddam Neck Plant agree with the general intent of the draft Regulatory Guide to endorse Revision 2 to NUMARC 93-01. In addition, the 4

following two specific comments are provided:

1. The wording in the last paragraph in the " Emergency Diesel Generators" section conflicts with that provided in NUMARC 93-01. Specifically, Draft Regulatory Guide i

DG-1051 states that "A_jl SSCs within the scope of the rule..... are subject to the i

requirements of 10CFR50.65(a)(3), including (1) periodic evaluation, (2) balancing reliability and unavailability, and (3) assessing the impact....." The conflict is with item (2) of this statement. Section 12.2.4 of NUMARC 93-01 statet that the (a)(3) 4 1

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' U.S. NuclIar Regul: tory Commission B15997\\Page 2 requirement for balancing reliability and unavailability gnly applies to risk significant Structures, Systems and Components (SSC) and not all in-scope SSCs as indicated in Draft Regulatory Guide. DG-1051.

Unavailability is only monitored for risk significant systems.

2. It is not clear why this paragraph is provided in the " Emergency Diesel Generator" (EDG) section as this discussion on the requirements of 10CFR50.65(a)(3) is a i

generic issue and not specific to the EDGs.

Should you have any comments or questions regarding this matter, please feel free to i

contact Mr. Kevin Hastings, Maintenance Rule Project Manager at (860) 447-1791, ext.

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5204 or Mr. Steve Scace at ext. 5372.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY CONNECTICUT YANKEE ATOMIC POWER COMPANY fM T. C. Feigenblium Executive Vice President and r

Chief Nuclear Officer cc:

U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 i

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