ML20054D875
| ML20054D875 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/15/1982 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8204230465 | |
| Download: ML20054D875 (3) | |
Text
so q
g 2
h' da RECEIVED w
n
- kQD APR 2319825 %
mm m,,
g NN Telephone (412) 456I000 2
S Nuclear Division PO. Bord t
g-April 15, 1982 Shippingport, PA 150774004 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Attn:
Norman C. Mosley, Director Livision of Program Development and Appraisal Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Performance Appraisal Inspection Report 81-29 Centlemen:
As requested in NRC (J. A. Taylor) Ictter dated March 31, 1982, this supplemental response is being submitted to clarify two items discussed in our response to the Performance Appraisal Inspection.
This information concerns Class II instrument calibrations and the status of the maintenance back1cg work.
Class II ins t t umen t calibration In order to address concerns over operators having to rely on non-Category I instruments that had not been calibrated for several years when responding to emergency situations, the station accelerated the preventive maintenance calibration for those instruments which were referred to in abnormal and emergency procedures.
Our review of the Class II instrument list identified over 50 instruments for calibration, most involving transmitters and other loop components. The calibra t ion work was then started, prioritized on:
a) the importance of the instrument in an emergency and b) the availability of redundant indications should the subject instrument fail to operate.
A study conducted for the first 20 loops calibrated determined that the inaccuracy within the operating range was insignificant for 90% of the instruments.
The two instruments that had significant errors are backed by several levels of redundancy.
l The station intends to perform a 5-point calibration, prior to startup, for all of the approximately 50 instrument loops identified a t. required by the emergency procedures. Currently, 38 of the loops have been calibrated, 3 are being calibrated and 13 remain to be calibrated.
82 0 4 2 3 0 'M6 (o{
t
Bravar Valley Power Station, Unit No.1 Docket No. 50-334, License No. DPR-66
- Parformance Appraisal Inspection Report 81-29 l
/
Page 2 The non-Category I instruments used for emergency procedures will then be placed on a 36-month frequency for maintenance calibration coupled with a review to determine if this schedule needs to be adjusted.
A preventive maintenance program for the remaining non-Category I instru-ments will be reviewed af ter the outstanding MWR backlog is reduced to an acceptable level. This review will prioritize the instruments and deter-mine if any additional instruments should be placed on a definite schedule for preventive maintenance.
Maintenance backlog work l
The maintenance supervisory staf f has been increased in number providing for a more controlled, more productive basis on which to operate.
The planning and scheduling has been revised so the computer program is updated on a timely basis. This permits more effective use by management of the computer tracking programs for assessing work loads.
The backlog report is periodically reviewed to eliminate redundant and nonessential work items to maintain its usefulness as a management tool.
I l
Since the station is currently in an outage, the addition of many new outage related work items has made it dif ficult to truly assess the effec-tiveness of our efforts to reduce the current backlog.
If, after the outage, i
the backlog does not continue to decrease toward an acceptable low level, I
we will review and modify our program to improve our performance.
Should you have any questions concerning this response, please contact my office.
Very tru y yours, J... Carey Vice President, Nuclear cc:
Mr. D. A. Beckman, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station j
Shippingport, PA 15077 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 United States Nuclear Regulatory Commission Office of Inspection and Enforcement i
Attn:
R. C. Haynes, Director i
Region I 631 Park Avenue l
King of Prussia, Pennsylvania 19046 1
1 m.
s
/
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Performance Appraisal Inspection Report 81-29 Page 3 cc:
United States Nuclear Regulatory Commission Office of Inspection and Enforcement Attn: James M. Taylor, Director Division of Reactor Programs Washington, DC 20555