NRC-87-0140, Responds to Violations Noted in Insp Rept 50-341/87-22 Re Jamesbury Butterfly Valves.Valves Repaired Following Individual Failures.Remaining Carbon Steel Shafts & Wafers in Jamesbury Valves Will Be Replaced W/Stainless Steel Matl
| ML20237H672 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 08/21/1987 |
| From: | Agosti F DETROIT EDISON CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CON-NRC-87-0140, CON-NRC-87-140 NUDOCS 8708250105 | |
| Download: ML20237H672 (3) | |
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O.k Detroit e-m EDISON $$i"0SCII3li!f Nuclear 0 0)5 % 4000 operations l
l August 21, 1987 NFC-87-0140 t
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U. S. Nuclear Regulatory Commission l
Attn: Document Control Desk Washington, D. C.
20555
References:
1)
Fermi 2
.l NBC Docket No. 50-341 i
NRC License No. NPF-43 2)
IE Inspection Report No. 50-341/87022, dated July 23, 1987
Subject:
Responsf to Notice of Violation 50-341/87022-01 i
Reference 2 identified a violation concerning Jamesbury butterfly valves. Detroit Edison's response is attached.
We trust this letter satisfactorily responds to your concerns. Please contact Mr. L. Bregni at (313) 586-4072 if you have any further questions.
Sincerely, i
TT C.
F. E. Agosti, Vice President Nuclear Engineering & Services Enclosure cc: Mr. A. B. Davis Mr. E. G. Greenman Mr. W. G. Rogers Mr. J. J. Stefano USNBC Region III l
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II 8708250105 070821 PDR ADOCK 05000341 o
b Enclosure to NBC-87-0140 Page 1 l
REPLY TO NCTTICE OF VIOIATION 50-341/ 87022-01 l
Statement of Violation Criterion XVI in 10CFR50, Appendix B, states that for significant l
l conditions adverse to quality measures shall assure that the cause of the condition is determined and corrective action taken to preclude repetition.
l Contrary to the above, corrective action taken in response to l
safety-related, Jamesbury butterfly valve failures has been inadequate l
to prevent repeated failures from the same, common cause. These failures occurred in September 1984 (T2300-F409), Novenber 1985 (T4600-F401), and August 1986 (T2300-F410).
q This is a Severity Level IV violation.
l Corrective Actions Taken and Results Achieved The three Jamesbury butterfly valves identified above.were each repaired following their individual failures. Valve T2300-F409, the first of the three valves to fail, was reassembled using a new carbon steel shaft and wafer assenbly. Valves T4600-F401 and T2300-F410 were reassembled using stainless steel shafts and wafers in place of their original carbon steel components.
Corrective Stens that will be Taken to Prevent Recurrence The remaining carbon steel shafts and wafers in safety-related Jamesbury valves will be replaced with stainless steel shafts and wafers. Twenty-three of the thirty-three safety-related Jamesbury l
butterfly valves already have stainless steel components. The l
remaining ten valves will be modified by replacing their carbon steel i
i shafts and wafers with corresponding stainless steel components prior l
to startup following the first refueling outage. These valves are:
1 T2300F409 Torus /RX Bldg. Vacuum Breaker l
T4600F402 S7GS Drywell Purge T4600F407 Drywell Purge T4600F408 Drywell Purge T4600F409 Drywell Purge T4600F410 SGTS Air Inlet from Refueling Area 1
T4800F405 Torus N Inert.
2 T4800F407 Drywell Purge Air Inlet T4803F601 N Makeup to Drywell 7
T4803F602 Drywell Inboard Exhaust i
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I c-Enclosure to NBC-87-0140 Page 2 In the interim, the ten Jamesbury valves with carbon stee1' internals
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will be monitored by stroke-time testing monthly until they;have been '
.i modified as described above.. The twenty-three safety-related Jamesbury valves with stainless steel internals will continue to be monitored by stroke-time testing in accordance with IST Program.
Date of Full Conellance Full conpliance will' be achieved prior to startup following the first refueling outage.
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