U-601000, Informs NRC of Completion of Mods to Facility Hydrogen Mixing Compressor Rooms.Proposed Mod Would Require Upgrade of Environ Qualification Data.Fsar Will Be Revised to Include New Equipment Environ Qualification Data
| ML20236N056 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 08/06/1987 |
| From: | Spangenberg F ILLINOIS POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| U-601000, NUDOCS 8708110356 | |
| Download: ML20236N056 (2) | |
Text
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U-601000-L30-87(08-06) 1A.120-
/LLINDIS POWER CON 1PANY IP l
CLINToN POWER STATION. P.o. Box 678, CLINToN, ILLINolS 61727 '
August 6,.1987 10CFR50.44 Docket No. 50-461 U.S. Nuclear Regulatory Commission Document Control Desk l
Washington, D.C.
20535
Subject:
Clinton Power Statiott Hydrogen Mixing Compressor Room Modification
Dear Sir:
The purpose of this letter is to inform the.NRC of the completion of modifications to the Clinton hydrogen mixing compressor rooms.
Illinois Power Company identified the neer! to modify.the two rooms ir. side containment which contain the Combustible Gas Control System hydrogen mixing compressors in IPC letter'U-600850 dated March 11, 1987.
It was noted in this letter that, as configured,,the rooms did not meet i
the originally 1.ntended. function of protecting the contained equipment from post-accident environma,ntal conditions in the event of rapid containment pressurization.
It was decided that the doors to.these rooms would be removed to eliminate the concern of sealed room response-to rapid pressurization and to eliminate the need to classify the rooms as enclosed area. In addition, removing the doors would negate.the requirement for hydrogen igniters in the room. -As a result of this-proposed. modification, it would be necessary to upgrade' the-
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environmental qualification of the equipment in the rooms.-
The removal of the doors to the hydrogen mixing-compressor rooms has been completed. The safety-related room coolers will continue to l
start with the mixing compressors, mixing the air in the rooms, but will l
no longer maintain the air temperature in the rooms below 150'F.
Since I
the air temperature in the rooms may now reach 185*F, the equipment qualification packages have been upgraded from 150*F to 185'F for the equipment in these rooms (e.g. mixing compressors, drywell isolation valves and room coolers).
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The Clinton Power Station Final Safety Analysis Report will be revised during the next update to include the new equipment j
l environmental qualification data for the affected components.
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Y)Q 8708110356 870806 I
PDR ADDCK 05003461 1
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U-601000 L30-87 (08 -06) 1A.120 if you should have any questions on this matter, please contact me.
Sincerely yours, j
F. A. Spa genb g, III Manager - Licensing and Safety
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TAB /ktm cc:
B. L. Siegel, NkC Clinton Licensing Project Manager i
1 NRC Resident Office Regional Administrator, Region III, USNRC Illinois Department of Nuclear Safety
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