ML18113A295

LER 1976-046-00 for St. Lucie Unit 1, the Containment Personnel Air Lock Outer Door Would Not Open Because of an Inoperable Door Operating Mechanism

ML18113A295
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: ML18113A295 (5)

Text

'L ~t NRC FORM 195 U.S. NUCLEAR REGULA SS I ON DOCKET NUMBER I2-TB) 4 50-335 FILE NUMBFR NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL INCXDENT REPORT

.TO:

Norman C Moseley FROM:'lorida Power 8t, Light Co.

DATE OF DOCUMENT 12-30-76 .,

Miami Florida 33101 DATE RECEIVED A.>. Schmidt 1-10>>77 ETTER QNOTORIZED PROP INPUT FORM NUMBER OF COPIES RcCEIVED ABORIGINAL PQU N C LASS I F I E D

@@COP Y 30 opuses DESCRIPTION ENCLOSU RE Ltr. Trans The Following: , Licensee Extent Report '(RO-',+0-g3$ /'t6-II6 on 12-01-76 concerhing-contalnmentlpersonnel a lock ~oor. wouh< not open ue sheare ro31hr shaft on cam in zoor 8c bent mechanical. <oop tzKtel stopo ~ ~

~ gi'

( 1 pag )

30 encl rec'<)

PLANT NAME: ST WCIE UNIT g l ( 2 pages )

DONOT REMQVE NOTE: IP, PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS 0~EDGED FOR ACTION/INFORI'tIATION BRANCH CHIEF:

N 3 CYS FOR ACTION LIC ~ ASST,:

M CYS ACRS - CYS S NT INTERNAL D IST RI BUTION ~

REG F NRC PDR IGE (2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRItKS CASE BUTLER HANAUER TEDESCO/HACCARY EISENHUT MER SHAO VOLLEYER/BUNCH KREGER/J ~ COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR:

TIC:

N~C.

oem Il II I ll

P. O. SOX 013100, MIAMI, FL 33101

~ ~

jegulafary DOCget Fl, OOCRSSSO USNRC, FLORIOA POWER Si L-.

LIGHT COMPANY 0!

/u-I U.S. HUCISRR December 30, 1976 RSCULA COM M I S 5 fOH A RY PRN-Ll:-76-317 Mall Sacllaa Mr. Norman C. Moseley, Director, Region Office of Xnspection and Enforcement l:

U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURREVC" 33:"-76-46 ST. LUCIE UNXT 1 DATE OF OCCURRENCE: DEC:"'M:-R 1, 1976 PERSONNEL AER LOCc(

The attached Licensee Event Report is being submitted i.n accordance with Technical Specificat'n 6.9 to provide 30-day notification of the subject occurrence.

Very truly yours, Vice President Power Resources MAS/cpc Attachment CC Robert Lowenstein, Esauire Director, Office of inspection a..d ==.=o cement (30)

Di ector, Office of Management :nfor.= tion and Program Control (3) 260 PEOPLE ~ ~ ~ SER'IlNG PEOPLE

LICENSEE EVENT REPOIQ)

CONTROL SLQCK: (PLASS PAINT ALL AEQUIAHlIHFCRPRATIQN]

1 6 UCSNSEE LICENSE NAME LCKNSc NUMBER EVE'YPE TYPE

[oa~] F L S L S 1 0 0 I 0 0 0 0 I 0 0 0 4I 1 1 1 1 ~03 as

~

14 15 25 26 30 31 32 AEPOAT, AEPOAT l

CATEGORY TYPE SOURCE COCKET NUMBER EVENT O*Tc PEP RT CATE I001] coN'r 7 8 57 58 L

59

~L 60 61 0 5 0 0 3 aa 2 0 l 7 6 74 75 l 2I3 Ol 7 80 I

I EVENT OESCRIPT!ON

[oO<J as The containment ersonnel air lock outer door would not o en because of an ino erable door o eratin mechanism. The r acto was ~l i 7 89 80

~o < hot standb . The* door o eratin mechanism was re aired and verified to be 7 8 9 ao

@05 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 7 8 9 "

80 g o erabilit re uirements of Technical Soecification 3.6.1.3 were not met.

~

Qo 7 8 9 FPMK 80 SYS~c. CAUSE CO4PCNENT " COMPONENT COCK COOK COMPONENT COOK SL'i".FL'ER M "hrUFACrrIFER 7 8 9

~SA 10,11 ~E 12 P E N E T R 17 A

r33 C I 3I l 0 N CAUSE OESCRIPTIQN Qg8 9 The cause of the 7

roblem was a sheared roller shaft on a cam in " ~ oor 89 ooeratin mechanism and a bent mechanical door trav l s oo w 80 Q~ 0 replaced and the travel stop read'usted. Th darn co was v 7 89 FACUTY 80 METHOO CF 0~3 7 8 STATUS 9

~E FORM OF

~

Loaoo 0

POVVCR f12 13 OTHER STATUS OISCOVERY OISCOVEAY OEESCALPT:ON N/A 80 A~r CONTENT Rc~c SEO OF CcLEASE AMOUNT CF A~iffY LOCATION CF A~ESK

@~2 ~Z Z N A N A 7 8 9 10 11 PERSONNEL EXPOSURES NUMBER TYPE OESCAS3T:CN IrrzI ~oo 0 ~z N A 7 8 9 11 12 13 80 PERS'QNNEL INJURIFS 7

EH89L00 I~

NUMBcR 11 12 CESCAIPTION 60 PRQB~LP'ONSEGUEVC<S N A as 60 LOSS QR OAMAG< TO FACILITY PE OESCAIPTICN z N A 7 89 10 .ao PUSLICfTY 7 8 9 AOOITIONAL FACTORS Q~ I89 See Pacre Two for continuation of Event Descri tion and Cause Descript'on.

80 7 89 N. A. Schoooman PHONE. 305 552-3779

&PS SI ~ SST

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

The damaged operating mechanism was repaired and the mechanical door travel stop adjusted to prevent recu rence. 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 l. The first occurrence was reported as Reportable Occurrence 335-76-14. (335-76-46)

Cause Descri 0ion (Continued) large amount of traffic through the airlock during the extended plant outage and full core reload comp'eted in November.