ML20052E745
| ML20052E745 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/06/1982 |
| From: | Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0460, RTR-NUREG-460 NUDOCS 8205110403 | |
| Download: ML20052E745 (2) | |
Text
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4 PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101
- v. s. so y cn sn. v.cc racsiocar MOY 6 1982 f
NUCLE AN POWEf4 Mr. Harold R. Denton y[
Office of Nuclear Beactor Pegulation j
q Nuclear Ibgulatory Cmmission
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gkyJ Washington, D.C. 20555
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Subject:
Implmentation of AEG Modifications at p Peach Bottm Atmic Power Station, Units 2[4 W
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Docket Nos. 50-277 & 50-278
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Reference:
Ictter V. S. Boyer to H. R. Denton on Impl
'tiona of A%S Mitigation Alternative 3A, dated March 31D980
Dear Mr. Denton:
In the referenccd letter, Philadelphia Electric Cmpany ccmnitted to installing AUG nodifications consistent with Alternate 3A, as discussed in Volume 4 (draft) of NUREG-0460, in Peach Bottm Atmic Power Staticn, Units 2 & 3.
Our anticipated schedule for this effort included cmpletion of design by Decmber 1980 and installation based on equignent availability. This ccximitment was made assuming that the AEG rulemaking would be cmpleted in the near future, that this rulemaking would require Alternate 3A features and our desire to be responsive to'the NBC on this issue. We have since reconsidered our ccnmitment for the following reasons:
1.)
The finalization of the A%S rules has not taken place and at the present time there are two alternative rules under consideration.
Therefore, it is not clear what will ultimately be required to resolve the A%S issue.
2.)
We rmain convinced that prevention of A%5 is a sufficient solution.
3.)
Peach Bottcm has been selected by IDOOR as the Mark I reference plant and will be analyzed to study the effects of severe accidents.
As noted in the referenced letter, the Peach Bottm Units are already equipped with recirculation pump trip (RPT). At the present time we are proceeding with the design and installation of the alternate rod insertion systcm (ARI), redundant and diverse scram discharge volume level instrumentation, and logic modifications to reduce the number of isolation transients. We anticipate ccrapletion of design, procurement and material deliveries by mid-1983 with installation at the subsequent refueling outages on each Unit.
col r
/O e205110403 820506
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PDR ADOCK 05000277 P
9 We believe these modifications provide a sufficient solution to A'Iws.
We will await the results of the current rulemaking and the IDCOR study for further consideration of the requirments of any mitigation features.
Sincerely, 1
IEP/gra/I-2
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