ML20073E581
| ML20073E581 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/24/1991 |
| From: | Helwig D PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20073E585 | List: |
| References | |
| NUDOCS 9104300300 | |
| Download: ML20073E581 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY NUCLEAR GROUP HEADQUARTERS 955 65 CHESTERBROOK BLVD.
WAYNE, PA 19087 5691 (sis) s40 esso o Avio n. HEL. WIG jg g4 jggy VlCE PRESIDENY wuc6Ean EN6tNEERING & SERVICES Docket Nos. 50-277 50-278 License Nos. DPR-44 DPR-56 m
O.S.
Nuclear Regulatory Commission
- Attn:
Document Control Desk Washington, DC 20555 s
Subject:
= Peach Bottom Atomic Power Station, Units 2 and 3 10CFR50.63, " Loss of All Alternating. Current Power" Revised Station Blackout Analysis
' Dear > Sir Enclosed please find our tevised complete Station Blackout (SBO) ianalysis for Peach Bottom Atomic-Power Station'(PBAPS), Units 2 and 3, This.-response supersedes our previous responses to 10CFR50.63, i.e.,
our e
letters dated April _ 17, 1989 and April 3, 1990,'and-is presented.in the
.same format-as these previous submittals.
Included in the enclosed analysis is-information~which.we agreed to provide.during our April's, 1991 c
meeting with_the NRC.
The specific _ items agreed _to_at-the meeting are-restated below along-with-a cross' reference to the Enclosure where the item "is discussed.
i Ltem Cross Reference to. Enclosure.
1 1.
Losses attributed to no-load losses Tables 1 and-2; specifically on:startup transformer.
entry tt35 on cach table.
'2,
_ Minimum required loads for loss of Tables 1 and 2.
'offsite power (LOOP)cand SBO.
~3.
' Analysis-of suppression pool Section C.4.'d.
Figures 2-9.
p temperatures and' pressures.
_ l:..
l4
- Operator actions' required for a LOOP Table 3.
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e v.e n t.
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In addition, the NRC's summary of the April 5, 1991 meeting, L
' issued. April 12, 1991, specified NRC questions regarding certain SBO analysis issues.
These: issues are restated below along with a cross h.
reference to the Enclosure where the issue is discussed, r
PDR ADOCK 05000277 QbO 9104300300 910424 P
POR
U,.S. baclearRegulatoryCommission April 24, 1991
" Loss of All Alternating Current Power" Page 2 Revised Station Blackout Submittal
_ Issue Cross Reference to.. Enclosure 1.
Condensate storage tank Sectionn C.1 and C.4.d.
inventory.
2.
LOOP safe shutdown loads.
Table 1.
3.
Instrutnent air capabilities.
Section C.3.
4.
Analytical assumptions for Sections C.1 and C.4.d.
recirculation pump seal leakage.
If you have any questions or require additional information, please contact us.
Very truly yours, i
Enclosure cc:
T.
T.
Martin, Administrator, Region I, USNRC J.
J.
Lyash, USNRC Senior Resident Inspector, PBAPS
_-