ML20065G974

Lists Commitments Re Palss Operability/Reliability.All Original Problems Corrected & Obtained Passing Results on Both Panels

ML20065G974
Person / Time
Site:	Catawba
Issue date:	10/01/1990
From:	Forbes J DUKE POWER CO.
To:	Adamovitz S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 9010240314
Download: ML20065G974 (2)

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. October.1,-1990-Susan S. Adamovitz, Region-II U.' S. Nuclear: Regulatory Conunission 101 Marietta Street, NW, Suite 2900-

-Atlanta, iga '30323 4,.

Subject:

. Catawba Nuclear Station

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Docket Nos 50-413 and 50-414 pALSS Operability / Reliability File'No:.CN-715.15 l

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.At the: exit interview at Catawba'. Nuclear Station ~ (CNS) we' agreed to T

the following commitments:

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By~ September 1,' 1990 - To repair the : pALSS as designed and

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.. maintain 175% ' reliability.

Results:

CNS has corrected

- all ' of. the. original problems and has obtained passing:

results on both~ panels,.however due to - new problems 'and

g repeated ~ calibration - drif ts on ; old. problems, CNS was not a

ables to achieve ~ a greater than 75% reliability..

CNS has-

-curr'ently focused its: skills on items 2 and'3.

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I 2)

'If i 75% ro11 ability cannot be. maintained with the current-j design off. the ~ panels, CNSE will either modify the current'

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panels or replace. the panels and' have - the; panels : operable.

This will -be accomplished ~ by. September : 1,'

1991.-

.Results:

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'Due to cthe :three - reasons listed below-CNS ~ has determinedL that it.would be best to replace the current panels and have

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~them operable by 9/1/91.

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Modification costs to redesign-the current panels to ani operable / reliable condition. would rival the new panel ~

replacement costs.

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-b)

The current maintensace/ operation, costs on the current' f

panels are excessive.

It would.be cost-ineffective to

- continue operating. the current panels on a 'long term g,'

basis.

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,i 9010240314 901001 PDR.ADOCK 05000413 P=

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PALSS Oyerability/ Reliability

Page'2'

,.b i Octobrr li 1990-c)

~ If the current' panels were redesigned, maintained and operated regularly it would-atill be very difficult to-maintain a greater than 75% reliability.

3)

We wil'1 expend great effort to achieve highest possible.

rollability of the PALSS panels between September 1, 1990.

.and September 1, 1991.:.Results:

CNSl. has operated.the Unit-1 panel a total of 19 test runs from the middle.of July to the 'end of August and Unit-2. panel a. total of 30 test runs from the1 first~ week in August to September,1.

A total' of 19 work requests have been. written between the two units.

CNS has corrected 7 problems on' the Unit-1 panel and has 1

-corrected 14. problems' on 1the..iUnit-2. panel... The

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requests a problem -solving f and.. panel - testing (has involved 20 employeesc -from Chemistry,

. Maintenance Engineering-

Services, Instrumentation and Electrical,

-Radiation j

Protection, Integrated Scheduling-and Planning.

Team-l effort from these, groups amounted to 1040 man-hours.

CNS 1

will continue to. test the panels once per month on'each unit; j

-and-will utilize. all available resources to ' maintain' the i

y highest possible reliability.

Any equipment problems :will

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-be handled in'a expedient manner.

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'Very Truly-yours,

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J. S.'Forbes

,1 iTechnical Services Superintendent I

Catawba Nuclear. Station e i I

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R.- M. Propst W. M. McCollum C]

C. L. Ilartzell'.

W.11. Miller R. L. Painter-R. A. Jones J.LR.,Wallace J. W. Hampton C. L. Therrien T.=E. Crawford J. C.: Taylor B. D. McNeill s

C J.,11. Amirl J. E. Reece 4

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