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)

Text

m- A o l O  ; r!M =

s ,

/.;

0( 5 .

,> y_ .

ing v

.{

' Duke Mer Cornpa 7 '(803)&11 2 000--

' ' ; J[ ,

y  :

. Cutuwba Nuclw Station I -

O />0 k ?% .. _

Clowr. SCZ9710 -

gs .- p j *, -.th.

N '

.pyggpyygg. Q Q( Y H d' . 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 [

Docket Nos 50-413 and 50-414 pALSS Operability / Reliability .,

File'No: .CN-715.15  !

l 3

.At the: exit interview at Catawba'. Nuclear Station ~ (CNS) we' agreed to '

T the following commitments: .,

y -

hi,

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

. . 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.

i t j

, , 2) 'If i 75% ro11 ability cannot be. maintained with the I

current-design off. the ~ panels, CNSE will either modify the current'

'[

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

% This will -be accomplished ~ by . September : 1,' 1991.-

~

.Results: .;

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

?h ~them operable by 9/1/91. l a)- Modification costs to redesign-the current panels to ani  ;

operable / reliable condition. would rival the new panel ~  !

replacement costs.

A

-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.  ;

y- ,

J

.i l

' << ,i 9010240314 901001 PDR .ADOCK 05000413 P= PDC -

.i l

^

if0 [

,&f f'I 3

v. - ,

pf [*: a-4l 9 .1 yd. : -k W

l', t *^

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 .w ork

, 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 10401 man-hours. CNS will continue to. test the panels once per month on'each unit; j

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

y highest possible reliability. Any equipment problems :will i

^'

-be handled in'a expedient manner. h 1

j t

.. Tj l

'Very Truly-yours,

.g {j WP d J. S.'Forbes ,1 iTechnical Services Superintendent I

. Catawba Nuclear. Station '

e i

! I

3. .i BDM/dlw- }>

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

' s J. C.: Taylor B. D. McNeill C J. ,11. Amirl J. E. Reece 4

i

!! .[. } ' ,

t.'