ML20247J824
| ML20247J824 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 05/22/1989 |
| From: | Muller D Office of Nuclear Reactor Regulation |
| To: | Holtzscher D ILLINOIS POWER CO. |
| References | |
| NUDOCS 8906010138 | |
| Download: ML20247J824 (2) | |
Text
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May 22, 1989 Doiket No. t 50-4611
,Mr'.. Dale L. Holtzscher 1 Acting Manager'. Licensing and Safety-Clint9n Power Station P. O. Box 678
' Mail Code ~V920 Clinton, Illinois.61727'
Dear Mr. Holtzscher:
SUBJECT:
ENVIRONMENTALQUALIFICATION(EQ)0FTERMINALBLOCKSONCONAX ELECTRICAL PENETRATIONS USED IN INSTRUMENTATION CIRCUIT APPLICATIONS
.Re:
Clinton Power Station, Unit No.1 We-have reviewed the environmental qualification report on the terminal blocks-in the Conax penetrations that you provided to us on Pay 1, 1989. We have also reviewed the information you provided at the meeting held on May 9,1989, and the. responses to our. questions, dated May 17. 1989. Based on our. review of the test data and the clarifying-information, we believe that _ operation with the :
terminal blocks in place is justified for ore cycle; but continue to have -
concerns regarding the qualification file for the terminal blocks, and will ofollow-up on these concerns during your forthcoming operating cycle. We recommend:
A qualification retest of the terminal blocks might-be advisable in view-Lof questions concerning the test environment as compared to the post-accident environment, or Replacement of all terminal blocks with qualified splices (based on a telephonic discussion on May 18, 1989, we understand that you will replace.
the terminal blocks in both control and instrument circuits).
Notwithstanding our concerns, we conclude that plant restart need not be delayed pending resolution of our concerns.
Please inform us of your specific plans as well as actions taken in this regard
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within 60-days.
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Daniel R. Muller, Director Project Directorate III Division of Reactor Projects III, g60 g $$3 1
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May 22, 1989 c
Docket Noc 50-461 Mr. Dale L. Holtzscher Acting Manager - Licensing and Safety Clinton Power Station P. O. Box 678-Mail Code V920 Clinton, Illinois 61727
Dear Mr. Holtzscher:
SUBJECT:
ENVIRONMENTAL QUALIFICATION (EQ) 0F TERMINAL BLOCKS ON CONAX ELECTRICAL PENETRATIONS USED IN INSTRUMENTATION CIRCUIT APPLICATIONS Re:
Clinton Power Station, Unit No. 1 We have reviewed the enviro.nmental qualific6 tion report on the terminal blocks in the Canax penetrations that you provided to us on May 1,1989. We have also i
reviewed the information you provided at the meeting held on May 9,1989, ano the responses to our questions, dated May 17, 1989. Based on our review of the test data and the clarifyin information, we believe that operation with the terminal blocks in place'is justified for one cycle; but continue to have concerns regarding the qualification file for the terminal blocks, and will follow-up on these concerns during your forthcoming operating cycle. We recommend:
A qualification retest of the terminal blocks might be advisable in view of questions concerning the test environment as compared to the post-accident environment, or l'-
Replacement of all terminal blocks with oualified splices (based on a telephonic discussion on May 18, 1989, we understand that you will replace the terminal blocks in both control and instrument circuits).
Notwithstanding our concerns, we conclude that plant restart need not be delayed pending resolution of our concernt.
1 Please inform us of your specific plans as well as actions taken in this regard within 60-days.
Daniel R. Muller, Director Project Directorate III-2 Division of Reactor Projects III, IV, V, and Special Projects
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