ML20206S548
| ML20206S548 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 06/18/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8607070378 | |
| Download: ML20206S548 (3) | |
Text
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DUKE POWER GOMPAhT l
P.O. Box 03180 CHAMLOTTE, N.O. 28942
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- HALII. TUCKER TELEPHONE e
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l June 18, 1986
, Dr.'J.1Neleen Grace Re'gional Administrator
'U.S? Nuclear' Regulatory Coussinsion l
Region II l
101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30302
Subject:
McGuire Nuclear Station Docket No. 50-369, 50-370
Reference:
RII:REW NRC/0IE Inspection Report 50-369/86-11, 50-370/86-11
Dear Dr. Grace:
Pursuant to 10 CFR 2.201, please find attached a response to the violation which was identified in the above referenced Inspection Report.
Very truly yours, b
f/hf Hal B. Tucker JBD/jgm Attachment xc:
Mr. W.T. Orders Senior NRC Resident Inspector McGuire Nuclear Station 1
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l 8607070370 860618 2
E DR ADOCK 05000369 '
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1 DUKE POWER COMPANY McGUIRE NUCLEAR STATION RESPONSE TO VIOLATION IN INSPECTION REPORT 50-369/86-11 AND 50-370/86-11 Violation 50-369/86-11-01 and 50-370/86-11-01,, Severity Level V Technical Specification 4.0.5 for McGuire Units 1 and 2 requires that "inser-vice inspection of ASME Code Class 1, 2, and 3 components and inservice testing of ASME Code Class 1, 2, and 3 pumps and valves shall be performed in accordance with Section XI of the ASME 3 oiler and Pressure Vessel Code and applicable Addenda as required by 10CFR 50, Section 50.55a(g), except where specific written relief has been granted by the Commission pursuant to 10CFR 50, Section 50.55a(g)(6)(1)." The McGuire pump and valve inservice testing program was developed in accordance with the 1980 Edition of the ASME Code.
IWV-3413, (b) of the Code requires that the stroke time of all power operated valves be tested on an interval specified by IWV-3412.
IWV-3417 requires that any abnormal or erratic action observed in the stroke timing shall be reported so that corrective action can be initiated immediately.
Contrary to the Code requirements, test data documented during the first three years of Unit 1 operation for valves ND 34 (RHR System) and NI 332A (CVCS) indicated stroke times of 0.0 seconds.
Identical valves in Unit 2 had measured stroke times of approximately 17 seconds and 10 seconds respective-ly.
No evaluation of this erratic behavior was documented or reported.
Response
1.
Admission or denial of the alleged violation:
Duke Power agrees that the violation occurred as stated.
2.
Reasons for violation:
The McGuire Section XI IWV & IWP submittal is a comprehensive program that has been developed over an extended period of time and is still being modified to correctly reflect plant conditions.
McGuire does have a number of quick acting valves that cycle in much less than 5 seconds, and personnel failed to recognize the size of these valves in their trends.
In addition, procedures do not generally indicate the size or type of valves that are being cycled. Concen-tration has been placed on having proper plant and system status prior to testing rather than aiding long term trends.
3.
Corrective steps which have been taken and the results achieved:
The problem with INI332 was identified in May 1984 and the limit switches were corrected at that time.
The valve stroke was satisfactory but the limit switches were not properly adjusted. The NRC Inspector discovered the short stroke time on IND34 in February 1985 and it was also corrected by adjusting the limit switches.
In both cases, the operation of the valves were satisfactory but indicated incorrectly for the computer timing. Since these valves have been worked'on, the timing has been consistent with no further indicated problems.
4.
Corrective steps which will be taken to avoid further violations:
i Immediately after these deficiencies were noted in February 1985, work was initiated on a data base program for the valve trending. The intent of this effort was to consolidate pertinent design information on the valves as well as having the counterpart valve on the same screen for comparison. This additional information was provided to improve our inspection ability on this program. We are maintaining our manual notebooks on the trend histories in order to provide backup for the data base. The technicians and appropriate engineers have been trained on this data base and are aware of the NRC concerns with our trending information.
In addition, this violation will be reviewed with the appropriate j
engineers and technicians in crew meetings to ensure that all involved in the IWV Program realize the importance of promptly identifying component problems.
5.
Date when full compliance will be achieved:
Full compliance will be achieved by August 1, 1986.
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