ML19259D660
| ML19259D660 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 10/19/1979 |
| From: | Mcguire P BOSTON EDISON CO. |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| 79-207, NUDOCS 7910260206 | |
| Download: ML19259D660 (1) | |
Text
BOSTON EDISON COMPANY oENERAL orrtcts 800 GovtsrcN SimECT Boston. MaseACNumENs o2199 October 19, 1979
- o. c A=L ANooo"'"'
BECo Ltr. #79-207 SUPERINTENDENT NUCLEAR QPERATIONs OEPamfMENT Mr. Thomas A.
Ippolito, Chief Operating Reactors Branch #3 Division of Operating Reectors Office of Nuclear Reactoi Regulation U.S. Nuclear Regulatory Commission License No. DPR-35 Washington, D. C. 20555 Docket No. 50-293 Containment Atmospheric Control System Ref:
(a) NRC Letter T.A. Ippolito to G.C. Andognini dated 3/14/79.
(b) BECo Letter G.C. Andognini to T.A. Ippolito dated 6/6/79.
Dear Sir:
In Reference (a) you requested that we submit a schedule for the installation and the testing of a CAD System at Pilgrim Station Unit #1.
Your inquiry also requested a detailed description of any design changes that we propose to make in our original system description (FSAR submittal, Amendment 35).
In Reference (b), we informed you that our current plans do n A call for the
'nstallation of CAD System and that we were evaluating a system that incorporates hydrogen recombination capability. Therefore, we request that you delete FSAR Amendment 35 from our docket.
To determine what cha.iges are currently required for post LOCA containment combustible gas control, we have evaluated the present station design with respect to 10CFR50.44.
Based upon our analysis, we comply with 10CFR50.44 with existing equipment.
Ilowever, we recognize that additional system modi-fications may be appropriate once the TMI-2 Lessons Learned Task Force has completed its long term recommendations.
As described in its short term recon:mendations (NUREG-0578), the TMI-2 Lessons Learned Task Force majority view was that the existing design basis for com-bustible gas control systems needs re-evaluation. We are therefore, unable to commit to any system design changes for combustible gas control at Pilgrim, until a final resolutfon is issued by the Commission on the system design bases.
Ilowever, we have revised our operating procedures, as necessary to mitigate the consequences of a TMI type incident in the unlikely event that it occurred and as stated in Reference (b), we will continue to operate with an inerted contain-k ment.
If you have any questions on this subject, please feel free to contact us at your convenience.
Very truly yours,
)2) 7 910260 zog C