ML20100C975
| ML20100C975 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 02/18/1985 |
| From: | Jens W DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| EF2-70395, NUDOCS 8504010033 | |
| Download: ML20100C975 (2) | |
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. Wayne H. Jens" Vtn President Nuclear Operatons Fermk2 6400 Norm Oxe Highway MO Nds.T4 February.18, 1985 EF2-70395 Mr.. James G.
Keppler Regional Administrator Region III U.
S.
Nuclear Regulatory Commission
,w,j' 799 Roosevelt Road Glen Ellyn, Illinois 60137
.i !
Dear _Mr.
Keppler:
Reference:
(1). Fermi 2 NRC Docket No. 50-341 (2) Letter, W.
H.
Jens to J.
G.
Keppler February 1, 1985, EF2-70235 (3) Letter, W.
H.
Jens to J.
G.
Keppler February 1, 1985, EF2-70239
Subject:
Detroit Edison Amended Response Inspection Report 50-341/84-53 This letter is intended to supplement Detroit Edison's Response to Inspection Report 50-341/84-53.
Specifically, this letter responds to an NRC inspector's concern that Reference 2 did not respond to the failure to document a problem with Target Rock Corporation (TRC) valve E41-F402.
Reference 2 explained that the generic problem with TRC valves-was well documented.
The problems recurred because i._
ofian incorrect diagnosis of the problem and not the failure to,. document' and trend a specific example.
.In reference 2, under " Documentation of Equipment Problems,"
the following : statement is made:
"As the Inspector's research revealed, problems with position indication for these valves were documented
.and investigated when the problems were discovered during local leak rate testing in May 1984.
At that time, -Detroit Edison requested and received the t assistance of the vendor in troubleshooting and correcting the problems with these valves.
At that time, these problems were thought to have been resolved."
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. ~Mr. James;G.'.Keppler
< February.18,L1985 E F2-70395 -
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. Improper (operation of valve.T50-F412A was documented 'and
, ? investigated under Test-Exception : Disposition Report (TEDR)
- 3 : of testLT5000.'001 on.May: 3, T1984.
Improper. operation of
? Ell-F415 was idocumented 'on Nonconformance Report -(NCR)~
.84-806; on. May 23, l1984.. However, ~ on May 24, 1984, a similar-c.:
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-problem occurred 'with valve lE41-F402. -This problem was not
^
- documented 'in - accor' dance with ' procedures
- although the Limproper; operation 'was noted. in the ; test package.
The.
~
~ individuals ; involved apparently. believed that the generic -
. : problem.with Target Rock valve position indication was already documented and-.was being investigated.
It should be
_ ln'oted: that ! earlier problems :with. Target Rock' position findication' had been. investigated -as. a generic. issue-
.( Reference _NCR' 83-1222' dated December 6, 1983).
LTh'e'-response.to Inspection Report-50-341/84-53 : e xplained that problems with' Target Rock, valves during leak rate.
testingTresulted from incorrectly. diagnosing the root cause:
- o f : the : problem 1 (i. e., incorrect actuator coll l' polarity).
'And, recurring problems with. these valves were -not the fresult ofJaHfailure'to' document-and trend equipment
~
1 p roblems.. This ' i's1 supported by the (fact-that in No vember:
'1984, -- both E41-F402 L and Ell-F415 were again identified as
. working ' improperly.
Ell-F415 had been repaired 'by - the
~
vendor;in May;bu,t,no documentation can be located to show sx.
~
t that ' Ell-F402 had been repaired.
iAs~ reported'in'R ference'3,? Detroit-Ndison's final' report of; 110CFR50.55(e) Item -142',
the: problems with Target Rock
. solenoid valves have been resolved.
If;you' have-questions regarding. this matter, please. contact
- M r. sLewis Bregni, '( 313) 586-5083.
' Sincerely, if r
b o
u icc:
P.;M.<Bryon
.R.
C.
Knop USNRC Document' Control Desk Washington, D. C.
20555 d-
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