ML18113A454

LER 1976-012-00 for St. Lucie Unit 1, During Preoperational Testing, Main Steam Isolation Valves Did Not Close within 6 Seconds as Required by Tech Spec 4.7.1.5.b

ML18113A454
Person / Time
Site:	Saint Lucie
Issue date:	05/12/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-116 LER 1976-012-00
Download: ML18113A454 (8)

Text

NRC FonM 195 U.S. NUCLEAn REGUI.ATonv COMMISSION oocKET NUMBER I2 78I S

NF'ISTRIBUTION.FoI'I PART 50 DOCI(ET MATERIAL-.

~ 50-335 FILE NUMBER INCIDENT REPORT TO: IFROM: DATE OF DOCUMENT FLORIDA POWER & LIGHT COMPANY 5/12/76 MR, NORMAN C ~ MOGELEY MIAMI~ FLORIDA DATE RECEIVED A, DE SCHMIDT 5/27/76 ETTER ~ QNOTOR IZED PROP INPUT FORM NUM BE R OF COP IES RE CE I V E D 0 ORIGINAL IBUNCLASSIFIED gCOPV NONE SXGNED DES C R I P T I 0 N ENCLOSURE LTD TRANS THE FOLLOWING: LICENSEE EVENT RPT. (RO 50-335/76-12) ON

/I/12/76 CONCERNING MAIN STEAM ISOLATION VALVE (MSIV HCV-08-iB) NOT MEETING TECH SPEC ~

E ACKNOVjtLED<<D.

DO.NOT REMOVE (1-P) (2OP)

="-'OTE:

. PLANT NAME: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO IEGER/J. COLLINS ST. LUCIE . 81

'AFETY FOR ACTION/INFORMATION ENVXRO 5 28 76 RJL BRANCH CHIEF: ZIEMANN W 3 CYS FOR ACTION I LIC ~ ASST: DIGGS W/ CYS I ACRS CYS HOLDING/ ENT TO LA INTERNAL D IST R I BUTION RE FILE NRCMDR

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SIIAO VOLT.l1F~RBU ASCII KIII~L'IQJ ~IH+INS EXTERNAL DIS1 IIIUUTION CONTROL NUfvIIIF.R LPDR: P R E T IC NSXC

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P;~~~+ A FLORIDA POWER 5 LIGHT COiAPAi'4Y May 12, 1976 PRN-LI-76-116 Mr.. Norman C. Moseley, Director, Region II )g Office of Inspection and Enforcement V. S. Nuclear Regulatory Commission 230 Peachtree Street, N. N., Suite 818 Atlanta,. Georgia 30303 AQUI g

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 335-76-.12 ST. LUCIE UNIT 1 DATE OP OCCURRENCE: APRIL 12, 1976 MAIN STEAM ISOLATION VALVE CLOSURE TIME

-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,

~u "w 9'o A. . Schmidt Vice President Power Resources N,

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MAS/cpc 8 Attachment Regufatory Docket Fife cc: Jack R. Newman, Esquire Director, Of fice of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3) 5326

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ilCENSEE EVENT REPORT CONTFIOL SLOCK: 03LKASE PAINT ALL REQUIRED INFORMATION],

1 6 041111~03 UCENSEE UCENSE EVENT NAME UCENSE NUMBER TYPE TYPE

[cD~] F L S L S 1 '0 0 0 0 0 0 0 0 89

~

7 14 15 25 26 30 31 32 REPORT REPORT 0335 CATEGORY OOCXET NUMBER EVENT OATS REPORT OATS

~CC CCNV TYPE i7 SOURCE

~L 0 5 0 0 4 12 7 6 0 512 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION

~0 2 Durin the preo erational testing phase, a periodic test of the Main 7 8 9 '80 Jog Steam Isolation Valves (MSIV') was erformed." MSIV HCV-08-1B did not 7 89 80

+0 4 obtain full closure within 6 seconds as re uired b Technical s ecifica-7 8 9 60

-Qg 7

tion 4.7.1.5.b. The 'closure time was about 7 seconds. Corrective aetio 8 9 SO, Qo6 was to ad'ust the cushion needle valve which allowed ad'ustment of the 89 PAME COMPONENT 7

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8 9 10

[BJ 11 12 V ALVEX COMPONENT COOS 17 44 S

MANUFACIUPER 07 5 47 VCIATEIN

~N 48 CAUSE OESCRIPTION

[oaf Air tra ed b the iston in the neumatic c linder was causin the 7 8 9 80 iston to be slowed durin the last 5 ercent of iston travel. A MSIV

7. 89 80.

~c o closure time of less than 6 seconds was obtained by adjusting the 7 89 FACUPf METHOO QF 80

!t POWER OTHER STATUS OISCOVERY QISCOVERY QESCRIPTIQN

~oo STATUS -

EH 7 8 hJ 9

FORM QF ACTIVITY 10'2 COATENT 13 N A 44 45 46 80 RELEASEQ QF RELEASE ~

AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 2 ~z .~z N/A N/A 7, 2 2 10 11 80

, PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION

~s ~oo 0 ~z N/A 7,S 9 11 12 13 PERSONNEL INJURIES N A

. PgPP~LZ CONSEOUENCES Qg 7M9 80 LOSS OR OAMAGE TO FACIVTY TYPE OESCRIPTIQN t11I L~J N A

~

7 89 10 SO PUBLlCITY N A Ba ~ 80 AOOITIONAL FACTORS

[isa] See Pa e Two for continuation of Event Descri tion and Cause Descri tion 7 89 60 7 89 80 M. A. Scho man PHONE305 552-3779

0 W REPORTABLE OCCURRENCE 335-7 6-12 LZCENSEE EVENT REPORT PAGE TWO EVENT DESCRZPTZON (Continued) valve stroke time'. The MSZV was retested and full closure was obtained within 6 seconds- of the "close" signal. This was the first occurrence of this type. (335-76-12),

CAUSE DESCRZPTZOH (Continued) cushion needle valve to bypass some of the trapped air. Zn addition, a special test, was performed to check the sizing of the air accumulator and it was found that the accumulator was under-sized. A Plant Change/Modification has been performed to increase the accumulator volume for both MSZV's.

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