ML20210P182
| ML20210P182 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 08/20/1997 |
| From: | Rang J CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20210P186 | List: |
| References | |
| NUDOCS 9708260466 | |
| Download: ML20210P182 (2) | |
Text
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4 ConsumersEnergy A CAIS Ene'gy Conr*"Y
&$d Mt Mur TM Keanen 9, Peeners 10269l&3I hkvth Plant GeneralManaqet Da%t. M 49??O August 20, 1997 f
Nuclear Regulatory Commission Document Control Desk
-Washington, DC 20555 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT - REPLY TO A REQUEST FOR ADDITIONAL INFORNATION REGARDING RERATING OF PORTIONS OF THE POST-INCIDENT SYSTEM.
In support of the March 1997, Post Incident System (PIS) pressure rerate, conservative analyses were performed to determine the response of VSW-3, a cast iron body isolation valve between the PIS and the Service Water System (SWS), to a liaiting 0.63 ft* steam line break. With insulation, the valve temperature rise at the time of Containment Spray System (CSS) initiation was calculated to be 3*F. Without insulation, the valve temperature rise at the time of CSS initiation was calculated to be 39'F. During the review of this evaluation, the NRC Staff identified a concern regarding the operability of this valve, and requested that Consumers Energy Company provide the following information relative to VSW-3:
- 1. Provide an addltional analysis or other justification that demonstrated that the valve was operable in the uninsulated condition for the licensing-basis accident condition.
- 2. If applicable, provide the time frame in which the valve was determined to be inoperable.
Attached to this letter is an additional analysis that demonstrates that VSW-3
-was operable in.the uninsulated condition for the licensing-basis accident condition.
Respectfully,
%ttJk
. ames S Rang h
I A ting Plant Ma e
CC: Administrator, Region-III, USNRC NRC Resident Inspector - Big Rock Point lllllll llgl(llll ATTACHMENT
,,m y 4 n 9708260466 970820 PDR ADOCK 0500G155 P
PDR,.
l ATTACMDtf CONSUMERS ENERGY COMPANY BIG ROCK P0 INT PLANT DOCKET 50-155 D0CKET 50-155 - LICENSE DPR BIG ROCK POINT PLAKI
-REPLY TO A REQUEST FOR ADDITIONAL INFORMATION REGARDING RERATING 0F P0RTIONS OF THE POST-IRCIDENT SYSTDI..
ENGINEERING ANALYSIS WORKSHEET EA-AIR-BRP-97-027 12 PAGES
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