ML20128L303
| ML20128L303 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 06/14/1985 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8507110307 | |
| Download: ML20128L303 (4) | |
Text
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DuxE POWER GOMPANY P.O. Isox m3180 CHAMLOTTE, N.C. 28242 HAL H.TUCKEN Teternome vars reensonst (704) 073-4 *38 June 14,1985
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Dr. J. Nelson Grace, Regional Administrator E$
U.S. Nuclear Regulatory Commission y
Region II
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101 Marietta Street, NW, Suite 2900 21 Atlanta, Georgia 30302 tv i
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Subject:
McGuire Nucicar Station
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Docket Nos. 50-369,30-370 Reference RII WTO NRC/01E Inspection Report 50-369/85-03, 50-370/85-03 Dear Dr. Grace Pursuant to 10 CFR 2.201, please find attached responses to violations 370/85-03-01, 369/85-03-03, 370/85-03-02, and 369/
85-03-04 which were identified in the above referenced Inspection 2
Report.
i Very truly yours, kl
/hh llal B. Tucker I
WilMiamh Attachments cc: Mr. W. T. Orders Senior Ronident Inspector - NRC McGuire Nucione Station L
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DUKE POWER COMPANY McGuire' Nuclear Station RESPONSES TO NRC/01E INSPECTION REPORT 50-369/85-03 Violation 369/85-03-03, 370/85-03-02 Severity Level IV Technical Specification (TS) 3.7.6 requires that two independer.t Control Area Ventilation Systems (VC) be operabic in all modes. With loth VC systems inoperabic the exir,encies of TS 3.0.3 become applicable. TS 3.0.3 requires that when a Limiting Condition for Operation is not met, within one hour, action shall be initiated to place the unit in a mod.: in which the specification does not apply.
Contrary to the above, on June 4, 1984, at 8:02 p.m., with train A of VC out of service for maintenance, VC train B chiller tripped placing both McGuire Units 1 and 2 in the exigencies of TS 3.0.3, and no action was taken to place the units in a mode in which TS 3.7.6 was not applicable until 10:05 p.m. a period of two hours and three minutes.
Response
1.
Admission or denial of the alleged violation:
Duke Power Company agrees that the violation occurred an stated.
2.
Reasons for the violation:
This violation occurred due to an administrative inadequacy resulting in a misinterpretation of Technical Specifications. When the train B chiller of the Control Aren Ventilation System (VC) tripped at 8:02 p.m.
due to low oil level, two at'.ampts were made to restart it.
After the attempts proved to be unsuccassful, the VC system was declared inoperabic at 9:05 p.m.
Since train A had previously been declared inoperabic for maintenance, both trains et /d were inoperable with a unit on line.
Based on the station's inte+ pretation of inoperability, in this case the control operator started to reduce power on Units 1 and 2 at 10:05 p.m. as required by Technical Specifications, rather than at 9:02 p.m.
(one hour af ter the initial chiller trip).
3.
Corrective steps which have been taken and the results achieved:
Following the initiation of power reduction, five gallons of oil were added to the train B chiller and the chiller was restarted. With VC Train B then operable, the operators stopped reducing power.
Additional details of this event are contained in LER 369/84-18 and LER 369/84-18 Revision 1.
t 4.
Corrective steps which will be taken to avoid further vlointions:
A Technical Specification interpretation was issued on March 27, 1985 l
which describes components which must be operable in order for the VC system to be operable. This list includes the A/D Train Control Room Chillers,therefore, in the future, if a chiller trips. the chiller will be declared inoperable.
5.
McGuire Nuclear Station is presently in fuli compliance.
l Violation 370/85-03-01, Severity Level IV:
Technical Specification 6.8.1 requires that current written approved proce-dures be established, impicmented and maintained covering the activities referenced in Appendix A of Regulatory Guide 1.33. Revision 2, which includes startup, operation and shutdown of safety-related systems.
l Contrary to the above, on December 21, 1984, Operations procedure Op/0/A 6350/01A,125VDC/120 VAC Instrument and Control power Inverter Shutdown, was not adequately impicmented in that the Unit 2 inverter was selected for deenergization instead of the Unit 1 inverter and the Unit 2 inverter "IN SYNC" light was not verified illuminated prior to deenergizing.
Response
1.
Admission or denial of the alleged violation:
Duke power Company agrees that the violation occurred as stated in Licensee Event Report (LER) 370/84-34 which was submitted to the NRC on January 22, 1985.
i 2.
Reason for violation:
l This event occurred due to personnel error, because an operator and independent verifier failed to properly identify the equipment which was to be removed from service.
Additional details of this event are contained in LER 370/84-34.
3.
Corrective steps which have been taken and the results achieved:
The operators restored AC power to the Channel 11 circuits approximately 8 minutes af ter the resulting reactor trip and proceeded to remove the Unit 1 inverter from service as originally planned.
Further details of the event and resultant actions are discussed in LER 370/84-34.
4.
Corrective steps which will be taken to avoid further violations:
The importance of following procedures and verifying action by the use of indicator lights was re-emphasized to all operating shif t personnel.
Additional details of the event and corrective actions are rontained in LER 370/84-34.
5.
Date when full compliance will be achieved:
McGuire Nucienr Station is presently in full compliance.
l i
e
Violation 369/85-03-04 Severity Level V:
Technical Specification 4.0.5 delineates surveillance requirements for Inservice Inspection and Testing of ASME Code Class 1, 2 and 3 components.
Technical Specification 4.0.2b states that the maximum combined time of three consecutive surveillance intervals for quarterly surveillance is 3.25 times the stated surveillance interval. The maximum allowed time for PT/11A/4350/17A Diesel Cencrator LA Fuel Oil Transfer Pump Performance Test, was 299 days.
l Contrary to the above, PT/11A/4350/17A was perforumd on March 20, 1984, July 9, 1984, October 3, 1984 and January 15, 1985. The actual combined time for the last three consecutive surveillance intervals was 301 days, l
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Response
l 1.
Admission or denial of the alleged violations l
Duke Power Company agrees that the violation occurred as stated in Licensee Event Report (LER) 369/85-02 which was submitted to the NRC on February 14, 1985.
2.
Reason for violation:
This event occurred due to a personnel error, because personnel failed to schedule the test before the end of the surveillance interval. A contributing factor was an administrative deficiency since the required surveillance was not listed as a quarterly computer listing of procedures to be performed in the next 12 week pariod. Additional details of this event are contained in LER 369/85-02.
3.
Corrective steps which have been taken and the results achieved i
When the Test Supervisor noted that the transfer pump test had not been perforred, the Test Engineer was notified.
Pcrformance Technicians were ment out to perform the procedure and satisfactory renuits were obtained.
Further details of the event and resultant actions are dis-cussed in LER 369/85-02.
l 4.
Corrective steps which will be taken to avoid further violations:
i l
Thu fuct oil transfer pump test for each diesel generator was ndded to I
the quarterly computer listing.
In addition, this listing is being j
reviewed by the Outnge Coordinator on a weekly basis rather than only j
during outages.
Additional detniin of thu event and corrective actions are contained in LER 369/85-02.
l S.
Date when full comptinnec will be achloved:
McGuire Nucicar Station la presently in full compliance.
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