ML20137G149
| ML20137G149 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 08/16/1985 |
| From: | Koester G KANSAS GAS & ELECTRIC CO. |
| To: | Denise R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| KMLNRC-85-199, NUDOCS 8508270187 | |
| Download: ML20137G149 (2) | |
Text
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o KANSAS GAS AND ELECTRIC COMPANY THEE ELECTRfC COMPANY GLENN L MOESTER wect Passiospe r - eewcLaam August 16, 1985 M@MOMF k
+
Mr. R.P. Denise, Director AUG22S85 Division of Reactor Safety and Projects U.S. Nuclear Regulatory Comuission
_ b Region IV
~ ~ ~
611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 KMLPDC 85-199 Re:
Docket No. 50-482 Ref:
KM MRC 85-197, dated 8/12/85 from GIKoester, KG&E, to RPDenise, NRC Subj: Additional Information Regarding Environnental Qualification of Terminal Blocks
Dear Mr. Denise:
The purpose of this letter is to clarify information contained in the referenced letter and to provide an update of activities relating to the nylon terminal blocks.
Two specific areas will be addressed; (1) clarification of the sequence of events leading to the discovery of 14 installed terminal blocks which were not environnentally qualified for high tenperature application and (2) an update of activities in the procurenent area regarding the terminal blocks in question.
Also as a point of clarification, the correct material name for the terminal blocks qualified for the high tenperature a w lication (part nunber ggg W32676) is " polysulfone".
e O Q.
88
- 1) Sequence of Events on In July 1985 during an oil cleanup effort in the area of the MFIVs &
M MSIVs, damaged terminal blocks wre discovered in an MSIV terminal box.
A total of four (4) terminal blocks wre replaced in MSIV AB-HV-14. It
- o was not known at that tine that the replacement blocks w re not R@
g qualified for the high tenperature a plication.
During the subsequent c a:
investigation of the damaged blocks, it was discovered that the
$@m replacement terminal blocks wre unqualified for the high tenperature application, i.e. the low tenperature terminal blocks were used.
The four replacenent terminal blocks wre determined to be from a specific lot of 16 terminal blocks ordered on 5/31/84 and received on 3
8/09/84 from Anchor Darling Valve Conpany.
I h
201 N. Market - Wichita, Kansas - Mail Address: RO. Box 208 i Wchita, Kansas 67201 - Telephone: Area code (316) 261-6451 ll}l
Mr. R.P. Denise August 16, 1985 i
10pmC 85-199 Additional terminal blocks from this lot were withdrawn on two previous occasions.
Six blocks were removed from stores on 12/07/84 and installed in MPIV AE-FV-42 and four blocks were removed from stores on 12/08/84 and installed in MPIV AE-FV-39.
The blocks were installed during a refurbishing effort on these particular valves in which a total of 10 <*-
+i blocks were removed and replaced. After the valves were put back into service a separate review of the qualification records was performed to ensure that the damaged polysulfone blocks were qualified for this application.
The results of the review indicated that the damaged blocks were qualified properly. However, no connection was made at that time to the nylon blocks installed in the MPIV terminal boxes because those replacement blocks had the correct part nunber (W32676).
- 2) Procurement Area Activities een the four terminal blocks in question were identified in the MSIV terminal box in Jtily 1985, the shipnent lot containing these blocks was checked to determine if other terminal blocks frora the same lot were installed in the field.
It was this effort that led to the identification of the other 10 replacement blocks installed in the field.
Thus 14 of the 16 total terminal blocks ordered in that lot were installed in the field and two blocks remain in the warehouse on hold. All 16 terminal blocks in that lot were verified to be nylon.
Additionally the previous shipment of terminal blocks with part nunber W32676 was checked for a similar problem.
This shipnent of 12 blocks arrived on 3/28/83. 'these blocks are all installed in the field and all have been inspected and found to be the correct material (polysulfone).
Also the new shipnent of 64 polysulfone terminal blocks which arrived on site on 8/11/85 was also verified to be the correct material.
As explained in the referenced letter the eight remaining nylon terminal blocks will be replaced at the first outage, but no later than the shutdown from the " Plant Trip from 100% Power" startup test.
If you have questions regarding this information, please contact me or Mr. Otto haynard of my staff.
Yours very truly, Glenn L. Koester Vice President, Nuclear i
GE: dab xc: PO'Connor (2)
JCummins