ML17199Z588

Confirmatory Action Ltr CAL-RIII-88-12 Re Corrective Actions for MSIV Failures During Slow Loss of Operating Air Test. Concludes That short-term Actions Will Ensure That Isolation Will Occur on Slow Loss of Air

ML17199Z588
Person / Time
Site:	Dresden
Issue date:	05/25/1988
From:	Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Reed C COMMONWEALTH EDISON CO.
References
CAL-RIII-88-12, NUDOCS 8806100233
Download: ML17199Z588 (3)

Text

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{) c:O Docket No. 50-237 Docket No. 50-249 Commonwealth Edison Company ATTN:

Mr. Cordell Reed Senior Vice President Post Office Box 767 Chi ca go, IL 60690 Gentlemen:

MAY 2 5 1988

SUBJECT:

CONFIRMATORY ACTION LETTER NO; CAL-RIII-88-12 Reference A.

Confirmatory Action Letter from A. B. Davis to Cordell Reed (CAL RIII-88-12) dated May 18, 1988 Reference B.

Commonwealth Edfson letter from J. A. Silady to A. B. Davis dated May 24, 1988 In response to your finding that all eight main steam isolation valves (MSIVs) failed to respond. as expected during a special slow loss of operating air test, you developed a plan to determine the cause and corrective actions.

We discussed your proposed course of action and documented our und~rstanding in Reference A.

Subsequently, on May 19, 1988, we established an augmented investigation team (AIT) to monitor your program. and independently assess the cause and significance of the apparent failures.

On May 24, 1988, the AIT completed its assessment, conducted its exit meeting with you, and in a telephone conversation between E. Eenigenburg and M. Virgilio you delineated short-term and long-term planned actions to enhance the reliability of the MSIVs.

Reference B. documented these commitments.

We have reviewed your findings, conclusions and proposed corrective actions related to the MSIV operator response on a slo~ loss of ~otive air. Based on this review, we conclude that short-term actions will ensure that the 8806100233. 880~~5 PDR ADOCK 05005~37 P

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Commonwealth Edison Company 2

MAY 2 5 1988 isolation function will occur on a slow loss of air.* Further, long-term actions will enhance the reliability of the MSIVs to accomplish their intended function under such adverse conditions. Accordingly, the CAL is terminated, and I concur with your request to start up.

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RIII Sincerely, t:_o~f.cr~

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..-i, Regional Administrator H. Bliss, Nuclear Licensing Manager E. Eenigenburg, Plant Manager*

DCD/DCB (RIDS)

Licensing Fee Management Branch Resident Inspector, RIII Richard Hubbard J. W. McCaffrey, Chief; Public Utilities Division J. M. Taylor, DEDO T. E. Murley, NRR E. L. Jordan,.AEOD J. Lieberman,* OE

• J. Clifford, EDO W. Lanning, NRR F. Miraglia, NRR*

G. Holahan, NRR D. Crutchfield, NRR J. Strasma, RIII J. Goldberg, OGC D. Muller, NRR B. Siegel, NRR RIII Riii RIII Jones/jp Ring Forney Greenman

Commonwealth Edison Company 2 MAY 2 5 1988 isolation function will occur on a slbw loss of air. Further, long-term actions will enhance the reliability of the MSIVs to accomplish their intended function under such adverse conditions. Accordingly, the CAL is terminated, and I concur with your request to start up.

Sincerely, Carl J. Paperiello Deputy Regional Administrator cc:

H. Bliss, Nuclear I

l Licensing Manager E. Eenigenburg, Plant Manager DCD/DCB (RIDS)

Licensing Fee Management Branch Resident Inspector, RIII

• Richard Hubbard J. W. Mccaffrey, Chief, Public Utilities Division J. M. Taylor, DEDO T. E. Murley, NRR E. L. Jordan, AEOD J. Lieberman, OE J. Clifford, EDO W. Lanning, NRR F. Miraglia, NRR G. Holahan, NRR D. Crutchfield, NRR J. Strasma, RIII J. Goldberg, OGC D. Muller, NRR B. Siegel, NRR RIII

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