ML20203P098

Special Rept:On 860329,mechanical Fire Penetration Returned to Svc After Being Inoperable for Greater than 7 Days.Caused by Unacceptable Repair on 860327.Foam Sealant Equipment Repaired & Personnel Trained

ML20203P098
Person / Time
Site:	Robinson
Issue date:	04/25/1986
From:	Morgan R CAROLINA POWER & LIGHT CO.
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RNPD-86-1828, NUDOCS 8605060331
Download: ML20203P098 (2)

Text

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Company Correspondence ROBINSON NUCLEAR PROJECT DEPARTMENT POST OFFICE BOX 790 HARTSVILLE, SOUTH CAROLINA 29550 APR 2 51886 Robinson File No: 13510C Serial: RNPD/86-1828 Dr. J. N. Grace Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30323 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261 LICENSE NO. DPR-23 30 DAY SPECIAL REPORT-FIRE BARRIER PENETRATION

Dear Dr. Grace:

This Special Report on the inoperability of a fire barrier penetration for more than seven days is submitted pursuant to Technical Specification (TS) 3.14. 7. 2. C .

Event

Description:

Unit No. 2 was in the process of startup from a refueling outage. On Friday, March 21, 1986, at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, a mechanical fire penetration between the Auxiliary Building hallway and the Pipe Alley was removed from service to repair a stainless steel tubing leak internal to the penetration. The penetration was returned to service on March 29, 1986, at 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br /> (8 days, 31/2 hours); therefore, the penetration was inoperable for greater than seven days as allowed in T.S.3.14.7.2.

The steam generator blowdown and blowdown sample line penetration between the Pipe Alley and the adjacent Auxiliary Building hallway was upgraded during the Refueling Outage (R.O. #10) . After startup from the outage, a leak developed in the steam generator blowdown sample tubing within the penetration seal.

The penetration was removed from service to repair the tubing leak on March 21, 1986, at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />. The operability of the fire detection systems on both sides of the penetration was verified in accordance with T.S.3.14.7.2.

With the tubing repaired, repairs to the seal were conducted the morning of Thursday, March 27, 1986; however, a penetration seal repair equipment malfunction caused the seal to be unacceptable.

8605060331 860425 PDR ADOCK 05000261 S PDR fi Q

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. b L;tter to Dr. J. N. Grace Serial: RNPD/86-1828 Page 2 The equipment problems were corrected, and the penetration was rescaled on the morning of March 28, 1986. The seal was inspected and found to have cosmetic defects. The seal was repaired, inspected, and declared operable on March 29,1986, at 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br />.

Cause:

This penetration seal was one of several specially designed seals which were installed by contract personnel during the refueling outage. Plant personnel had not been fully trained on the use of the foam sealant injection equipment; therefore, contract personnel had to be brought onsite to train Plant pc-sonnel in the use of the sealant injection equipment and assist with the repair of this penetration. This, combined with the equipment malfunction, caused the penetration to be returned to service later than expected.

Corrective Actions:

The foam sealant equipment has been repaired, and personnel have been trained on the use of the equipment.

If you have any questions concerning this matter, please call Mr. J. M. Curley at (803) 383-4524, exteraion 2367 Very truly yours, A

R. E. Morgan General Manager H. B. Robinson S. E. Plant JCS:ac l

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