ML20117A784
| ML20117A784 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/25/1992 |
| From: | Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19310D497 | List: |
| References | |
| NYN-92162, NUDOCS 9211300357 | |
| Download: ML20117A784 (3) | |
Text
e 4-Odii seabEfuso3874 Telephone (603)474 9521 jh(
Facsimile (603)474 2987 Energy Service _ Corporation -
Ted C. Feigenbaum Senior Vice President and Chief Nuclear Officer NYN 92162 November 25, 1992 United States Nuclear Regulatory Commission Washington, D.C.
20555 Attention:
Document Control Desk
References:
(a)
Facility Operating License No. NPF-86, Docket No. 50-443 (b)
NRC Letter, G. Edison to Docket No. 50-443_ dated February 27, 1992,
" Summary of Meeting With Public Service Company of New Hampshire Regarding Replacement of the Movable incore Detector System with a Fixed Incore Detector System at Seabrook Station (TAC NO. M82546)*
Subject:
License Amendment Request 9214; incore Detector System Gentlemen:
North Atlantic Energy Service Corporation (North Atlantic) has enclosed License Amendment Request 92-14 This License Amendment Request is submitted pursuant to 10CFR50.90 and is distributed pursuant to 10CFR50.4.
The purpose of License Amendment Request 92-14 is to propose changes to the Seabrook Station Technical Specifications. The proposed changes will allow tk fixed incore detectors to be used as an independent system to perform Technical Specification Surveillances, License Amendment Request 92-14 has been reviewed and approved by the North Atlantic Station Operation Review Committee and the Nuclear Safety Audit Review Committee.
As discussed in the enclosed License Amendment Request 92-14,Section V, the proposed changes have been determined not to involve a significant hazards consideration pursuant to 10CFR50.92. A copy of this letter and the enclosed License Amendment Request 9214 has been forwarded to the State of New Hampshire State Liaison Officer pursuant to 10CFR50.91(b).
During Seabrook Station's first and second fuel cycles, in excess of four hundred thousand dollars, six hundred man-hours, and one man-rem was expended in repairs to the movable incore detectors. This expenditure resulted from frequent failures of the movable incore detectors and associated drive equipment. In comparison, the fixed incore detectors have been relatively maintenance free for the first two fuel cycles. With NRC approval of License Amendment Request 92-14, North Atlantic will be able to utilize an incore 5C004G 0
9211300357 921125 a member of the Northeast Utilities system PDR ADOCK 05000443 s
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United States Nuclear Itegulatory Commission November 25, 1992 Attention:
Document Control Desk Page two Instrumentation System with a much higher degree of reliability.
In addition, the fixed incore detectors are operationally superior to the rnovable incore detectors.
The fixed incore d e te c t o r.s have the capability af providing almost continuous reactor core flu x monitoring. The fixed incore detectors provide flux map data every minute.
Using the movable incore detectors it takes greater than two 'ours to obtain equivalent data.
North Atlantic requests NRC review of I icense Amendment it eque st 92-14 and issuance of a license amendment by May 31,1993 (see enclosed License Amendment Request 9214,Section VI).
Yankee Atomic lilectric Company (Y AIIC) lleport YAIIC-18551>, "Scabrook Station U nit 1 Fixed Incore Detector System Analysis", is enclosed in Section Vill in support of the License Amendment Itequest. This report contains extensive comparisons between the power distributions determined by the fixed and moveable incore detectors.
These comparisons show excellent agreement which demonstrates that the fixed incore detectors are a viable alternative to the moveable incore detectors.
As Y AI!C-1855 P contains info-. tion proprietary to Yankee Atomic Electric Company i' is supported by an affidavit
'(ankee Atomic Electric Company. The affidavit sets forth the basis on which sign N info:marion may be withheld from public disclosure by the Commission and addresses with spc;ificity the conditions listed in paragraph (b)(4) of Section 2.790 of the Commission's i e p u h t ims.
Accordingly, it is respectfully requested that the information which is p a g.
ary to Y AliC be withheld from public disclosure in accordance with 10CFR2.790.
Should y iu have any questions regarding this letter, please contact Mr. Terry L la.rpster, Directar of Licensing Services at (603) 474-9521 extension 2765.
Very truly yours, 4'
rn Ted C. Feigenbaum N
TCF:M DO/act Enclosure
e q
-United States Nuclear Regulatory Commission Novemtier 25,(1992-Attention:
Document Control Desk Page three cc with enclosure:
Mr. Thomas T. Martin Regional Administrator United States Nuclear Regulatory Commission Region 1 475 Allendale Road King of _ Prussia, PA 19406 Mr. Gordon Edison, Sr. Project Manager Project Directorate I 3 Division of Reactor Projects U.S. Nuclear-Regulatory Commission Washington, DC 20555 Mr. Noel _ Dudley NRC Senior Resident inspector P.O. Box 1149 Seabrook, Nil 03874 Mr. George -Iverson, Director New flampshire Director of Emergency Management State Office-Park South 107 Pleasant Street Concord, Nil 03301 l
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