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| {{#Wiki_filter:m- A o l O ; r!M = | | {{#Wiki_filter:}} |
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| ' Duke Mer Cornpa 7 '(803)&11 2 000--
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| ''y :
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| . Cutuwba Nuclw Station I -
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| : Clowr. SCZ9710 -
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| gs .- p j *, -.th.
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| .pyggpyygg. Q Q( Y H d' . October.1,-1990-Susan S. Adamovitz, Region-II U.' S. Nuclear: Regulatory Conunission ,
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| 101 Marietta Street, NW, Suite 2900-
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| *. -Atlanta, iga '30323 ;
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| 4,. ' <' !
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| ==Subject:==
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| . Catawba Nuclear Station [
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| Docket Nos 50-413 and 50-414 pALSS Operability / Reliability .,
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| File'No: .CN-715.15 !
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| l 3
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| .At the: exit interview at Catawba'. Nuclear Station ~ (CNS) we' agreed to '
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| T the following commitments: .,
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| y -
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| hi,
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| , 1) By~ September 1,' 1990 - To repair the : pALSS as designed and 'i
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| . . maintain 175% ' reliability. Results: CNS has corrected ,
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| - all ' of . the . original problems and has obtained passing: '
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| :results on both~ panels, .however due to - new problems 'and
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| ;g repeated ~ calibration - drif ts on ; old . problems, CNS was not a
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| ', ables to achieve ~ a greater than 75% reliability.. CNS has-
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| -curr'ently focused its: skills on items 2 and'3.
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| i t j
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| , , 2) 'If i 75% ro11 ability cannot be. maintained with the I
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| current-design off. the ~ panels, CNSE will either modify the current'
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| '[
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| , , panels or replace . the panels and' have - the; panels : operable. '!
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| % This will -be accomplished ~ by . September : 1,' 1991.-
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| ~
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| .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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| ?h ~them operable by 9/1/91. l a)- Modification costs to redesign-the current panels to ani ;
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| operable / reliable condition. would rival the new panel ~ !
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| replacement costs.
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| A
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| -b) The current maintensace/ operation, costs on the current' f panels are excessive. It would.be cost-ineffective to
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| - continue operating . the current panels on a 'long term g,' basis. ;
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| y- ,
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| J
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| .i l
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| ' << ,i 9010240314 901001 PDR .ADOCK 05000413 P= PDC -
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| .i l
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| if0 [
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| ,&f f'I 3
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| : v. - ,
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| pf [*: a-4l 9 .1 yd. : -k W
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| l', t *^
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| PALSS Oyerability/ Reliability
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| ,. ;Page'2' b i Octobrr li 1990-c) ~ If the current' panels were redesigned, maintained and _
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| , operated regularly it would- atill be very difficult to- !
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| maintain a greater than 75% reliability.
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| :3) We wil'1 expend great effort to achieve highest possible.
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| rollability of the PALSS panels between September 1, 1990.
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| .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. ,
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| CNS has corrected 7 problems on' the Unit-1 panel and has 1
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| -corrected 14. problems' on 1the..iUnit-2. panel.. . The .w ork
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| , requests a problem -solving f and.. panel - testing (has involved 20 employeesc -from Chemistry, . Maintenance Engineering- !
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| Services, Instrumentation and Electrical, -Radiation j Protection, Integrated Scheduling- and Planning. Team- l effort from these, groups amounted to 10401 man-hours. CNS will continue to. test the panels once per month on'each unit; j
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| -and- will utilize. all available resources to ' maintain' the !
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| y highest possible reliability. Any equipment problems :will i
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| ^'
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| -be handled in'a expedient manner. h 1
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| j t
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| .. Tj l
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| 'Very Truly-yours,
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| .g {j WP d J. S.'Forbes ,1 iTechnical Services Superintendent I
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| . Catawba Nuclear. Station '
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| e i
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| ! I
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| : 3. .i BDM/dlw- }>
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| xc: R.- M. Propst W. M. McCollum C. L. Ilartzell'. W.11. Miller C] R. L. Painter- R. A. Jones J.LR.,Wallace J. W. Hampton C. L. Therrien T.=E. Crawford
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| ' s J. C.: Taylor B. D. McNeill C J. ,11. Amirl J. E. Reece 4
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| i
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| !! .[. } ' ,
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| t.'}}
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