ML20204H929
| ML20204H929 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/29/1986 |
| From: | Whittier G Maine Yankee |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 7879L-SDE, GDW-86-183, MN-86-100, NUDOCS 8608080249 | |
| Download: ML20204H929 (3) | |
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MAME HARHEE ATOMICPOWERCOMPARUe avaug,ay,?n"g%s h
(207) 623-3521 e
July 29, 1986 HN-86-100 GDH-86-183 Region I United States Nuclear Regulatory Commission Office of Inspection and Enforcement 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Dr. Thomas E. Hurley, Regional Administrator
References:
(a)
License No. DPR-36 (Docket No. 50-309)
(b) USNRC Letter to HYAPCo dated June 26, 1986 - Inspection Report No. 86-07
Subject:
Response to Notice of Violation in Inspection Report 86-07 Gentlemen:
This letter is in response to the Notice of Violation contained in Appendix A of Reference (b).
The Notice of Violation has been repeated below for completeness.
Notice of Violation 10 CFR 50 Appendix 8 Criterion XII states:
"Heasures shall be established to assure that tools, gages, instruments, and other measuring and testing devices used in activities affecting quality are properly controlled, calibrated, and adjusted at specified periods to maintain accuracy within necessary limits".
Item No. 7 of the licensee's controls and limitations for the repair order (DR/R0 #6184-85) for containment spray pump No. P-61A specifies that the final pump shaft to motor shaft total indicator runout readings be correct within.002".
Contrary to the above, as of May 14, 1986, measures were not established to control, calibrate and adjust the dial indicators used to measure, within.002", the shaft runout for the containment spray pump No. P-61A.
Also these dial indicators did not have any identification or other evidence of being properly controlled, calibrated, and adjusted at specific periods to maintain accuracy.
This is a Severity Level V Violation (Supplement I).
8608080249 860729 PDR ADOCK 05000309 G
PDR 7879L-SDE Q
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4 MAINE YANKEE ATOMIC POWER COMPANY United States Nuclear Regulatory Commission Page Two Attention: Dr. Thomas E. Murley, Regional Administrator MN-86-100 Maine Yankee Resoonse Maine Yankee requests reconsideration, in part, of tne Notice of Violation. The dial indicator used to indicate the pump shaft to motor shaft runout indicator readings on P-61A was not used as an absolute measuring device or for a final acceptance criterion during the replacement of the mechanical seals.
Contrary to the statement in the Notice of Violation, Step 7 of the Controls and Limitations to Discrepancy Report / Repair Order (DR/RO)
No. 6184-85 did not specify "...that the final pump shaft to motor shaft total indicator runout readings be correct within.002"."
Step 7 of DR/R0 No. 6184-85 instructed maintenance personnel to:
"After assembly is complete, record final pump shaft to motor shaft indicator runout readings.
(Manufacturer recommends to correct within.002" total indicator)...."
This step was included in this DR/R0 package for two reasons:
1).
To obtain a before and after maintenance comparison of pump shaft to motor shaft total runout indicator readings.
2).
To obtain diagnostic information on runout of the seal to optimize the mechanical seal life.
The.002" tolerance for total runout indication was a manufacturer's recommendation to minimize seal face wear but it was not an absolute requirement or safety acceptance criterion to be achieved in order to declare the pump operable.
Procedure 3.17.6.6 " Inservice Testing of Safeguards Pumps" requires parameters such as pump leakage, vibration, pump amps, and pressure to be evaluated. The acceptance criterion for each of these parameters must be achieved prior to returning safeguards pumps to service.
The testing required by Procedure 3.17.6.6 was performed on P-61A following mechanical seal replacement.
He do agree, however, that dial indicators which are used in safety-related applications should be controlled and calibrated. He have re-examined Maintenance Department practices where dial indicators may be j
used in safety-related applications. As a result, one procedure has been modified to require the use of a calibrated dial indicator, l
7879L-SDE 0
M AINE YANKEE ATOMIC POWER COMPANY United States Nuclear Regulatory Commission Page Three Attention: Dr. Thomas E. Murley, Regional Administrator MN-86-100 1.
To prevent a recurrence, Maine Yankee will, by October 31, 1986, place dial indicators to be used in safety-related applications under the Measuring and Test Equipment Program which satifies 10 CFR 50, Appendix B, Criterion XII.
Full compliance will be achieved by October 31, 1986.
Very truly yours, MAINE YANKEE ATOMIC P0HER COMPANY
))/ AV G. D. Whittier, Manager Nuclear Engineering and Licensing GDH/bjp cc: Mr. Ashok C. Thadant Mr. Pat Sears Mr. Cornelius F. Holden Q
7879L-SDE