ML18144A705

LER 1976-046-00 for St. Lucie Unit 1, Inoperable Door Operating Mechanism in Containment Personnel Air Lock Outer Door

ML18144A705
Person / Time
Site:	Saint Lucie
Issue date:	12/30/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-317 LER 1976-046-00
Download: ML18144A705 (3)

Text

FLORIDA POWER & LIGHT COMPANY December 30, 1976 PRN-LI-76-317 Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-46 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: DECEMBER 1, 1976 PERSONNEL AIR LOCK The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject occurrence.

Very truly yours, Vice President Power Resources MAS/cpc Attachment cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3)

PEOPLE... SERVING PEOPLE

CONTROL BLOCK: fPLEASE PAINT ALL REQUIRED INFORMATION]

1 UCENSEE UCENSE EVFNT NAME UCENSE NUMSEA TYPE TYPE 1 5 F L S L S 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~03 89 14 15 25 26 30 31 32 REPORT AEPOAT CATEGORY TYPE SOURCE OOCKET NUMBER EVEN% OATE AEPOAT OATS sCON'T~ L L 0 5 0 0 3 3 5 1 2 0 1 7 6 1 2 3 0 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION 2 The containment ersonnel air lock outer door would not o en because of 8 9 80 3 an ino erable door o eratin mechanism Th ac or 8 9 80 4 hot standb . The door o eratin mechanism was re aired and verified to be 8 9 80 5 o erable, however, a time s an of 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> ela sed while minimum airlock 8 9 80 6 o erabilit re uirements of Technical S ecification 3.6.1.3 were no m 8 9 FAME 80 SYSTEM CAUSE COMPONENT COMPONENT COOE CODE COMPONENT COOS SUPPVER MANUFACTUAEA

~SA ~E P E N E T R C 3 1 0 N 8 9 10 11 12 17 48 CAUSE OESCRIPTION 8 9 The cause of the roblem was a sheared roller shaf on a cam i 80 o eratin mechanism and a bent mechanical door travel o 8 9 80 re laced and the travel sto read'us ed. h m s 89 FACIUTY METHOO CF 80

~p STATUS 54 POWEA OTHER STATUS OISCOVERY OISCOVEAY OESCAIPTION N A 8 9 10 12 13 44 45 46 60 FOAM OF ACTIVITY COATENT AELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 2 Z N A N A 8 9 10 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE OESCAIPTION

~oo o ~z N A 8 9 11 12 13 80 PERSONNEL INJURIES NUMBEA OESCRIPTION 80 RQPPJ3LE CONSEQUENCES N A 8 9 60 LOSS OR OAMAGE TO FACILITY'YPE OESCAIPTION

~z N A 89 10 80 PUBUCm 8 9 ~ 80 AOOITIONAL FACTORS See Pa e Two for continuation of Event Descri tion and Cause Descri tion.

8 9 80 89 80 N. A. Scho man PHONE. 3 05 552-37 79 GFO 441 ~ 447

REPORTABLE OCCURRENCE 335-76-46 LICENSEE EVENT REPORT PAGE TWO Event Description (Continued)

The damaged operating mechanism was repaired and the mechanical door travel stop adjusted to prevent recurrence. During the repair period the inner airlock door was maintained closed and sealed, and the containment escape lock was operable. This is the second occurrence involving an inoperable personnel airlock at St. Lucie Unit 1. The first occurrence was reported as Reportable Occurrence 335-76-l4. (335-76-46)

Cause Descri tion (Continued) large amount of traffic through the airlock during the extended plant outage and full core reload completed in November.