ML18113A305

LER 1976-042-00 for St. Lucie Unit 1, with Reactor Shutdown for Fuel Inspection, Containment Purge Fan Was Started and Sufficient Vacuum Was Obtained to Cause Containment Vacuum Release Valve to Open

ML18113A305
Person / Time
Site:	Saint Lucie
Issue date:	09/03/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-234 LER 1976-042-00
Download: ML18113A305 (14)

Text

NRC FORM 195 U.S. NUCLEAR REGULATORV COI >SION DOCKET NUMBER I2.7B I ) 50-335 FILE NUMBER NAC DISH'RIBUTION FoR PART 50 DOCKET MATERIAL INCIDENT REPORT TO: FROM: DATE OF DOCUMENT Florida Power 6 Light Company 9 3/76 hIr. Norman C. Moseley Miami, Florida DATE RECEIVED A. D. Schmidt 9 14 76 LETTER ONOTOR IZED PROP INPUT FORM NUMBER OF COPIES RECEIVED 0 OR I 9 IN AL +UNCLASSIFIED One signed copy JKCOP V DESCRIPTION ENCLOSURE Ltr. trans the following: Licensee Event Report (RO 50-335/,76-42) on 8/3/76 concerning a Containment Vacuum Relief Valve opening thereby conflicting with tech specs.

ACKNOWLEDGED

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DQ NOT REMOVE PLANT NAME label NOTE: IF PEHSONNEK EXPOSURE IS INVOLVED SEND, DIRECTLY. TO KRHGER/J.. COLLINS St. Lucie gl FOR ACTION/INFORMATION 9 15 76

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P.O. BOX 013100, MIAIhl, FLORIDA 33101

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FLORIDA POWER F LIGHT COMPANY September 3, 1976 PRN-LI-76-234 Pfp(yf0 Mr. Norman C. Moseley, Director, Region II SEp g~

Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. 'W., Suite 818 u,,

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Atlanta, Georgia 30303

Dear Mr. Moseley:

0t 6 REPORTABLE OCCURRENCE 335-76-42 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: AUGUST 3, 1976 CONTAINMENT VACUUM RELIEF VALVE P

The attached Licensee Event Report is being submitted 3.n accordance with Techr.ical Specification 6.9 to provide 30-day notification of the subject occurrence.

Very truly yours, A. D. Schmidt ~CTHE Vice President Power Resources MAS/cpc fboA Attachment, cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

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LICENSEE EVENT REPORT coe7Roc accus:L-L- (P 6 PRINT ALL REQUIRED INFORMANT)ON)

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~ UCENSEE UCENSE EVENT NAME UCENSE NUMGER TYPL TYPE QOg F L S t L S 1 0 0 0 0 0 0 0 0 I 0 4 1 1 1 ~os 7 89 14 15 25 26 30 31 32 REPORT. REPORT CATEGORY TYPc SOURCE DOCKET NUMGER ~ EVENT DATE REPORT DATE

[oOI corn'-L-I ~z ~L 0 5 0 0 3 3I5 0 8 0 3 7 6 0 9 0 3 7 I 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION Qo 2 With the reactor shutdown for fuel ins ection, a containment, ur e fan was 7 8 9 80 QOg started and sufficient vacuum was obtained in containment to cause a a 9. 80

[oO~] Containment Vacuum Relief Valve to o en. This was in conflict with 7 8 9 60 QO g Technical S ecification 3.9.4. Core alterations were sus ended the con-7 8 9 80

[OD~] tainment ur e fan was t d a d th vac m 9 PRME SYSTEM CAUS'E COMPONENT CCMPONB4T CQOE CODE COMPONENT CODE SU~/ MANU sF

~~D F~s'oO~j z z C z z z z 9 9 N 7 8 9 10 11 12 17 43 CAUSE OESCF!IPTION 7

Qg8 9 Conta'nment urcre was started and s f 'cient va u wa o a 80

[ourn containment vacuum Relief valve. On Au ust 16 1976 a Technical S ecific 7 8 9 tion amendment was re uested to ermit automatic actuation of a vacuum 80 7 89 FAClUTY METHOD OF 80 STATUsS '.5 FOiVER OTHER STATUS DISCOVERY OiSCOVERY OcSCRlPfiCN Iz I ~0 0 0 Fuel zna actin a N A 7 8 9 10 12 13 44 45 FORM OF ACsSY CONTENT 7

KD a RELEASED a

OF RELEASE 10

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,11 AMOUNT OF ACTNffY N/A 44 45 LOCATION CF RELEASc N/A 80 PERSONNEL EXPOSURES NUMSER TYPE OESCRIPisQN

~oo o z N A 7 8 9 11 12 13 80 PERSQNi IEL INJURIES NUM GER CESCRiPTION Is-H Loaoo J N A 7 89 11 12 PROBABLE CONSEGUENCES 7

I11 j89 N A 80 LOSS OR OAMAGE TO FACILITY TYPc OESCRTPTION z N/A 7 89 10 80 PUSLICITY N A 7 8 9 ~ 80 AOOITIONAL FACTORS 7 8 9 7 89, 80 NAME. M. A. Schoppman PHONE. 3 05/552-377 9 sss sss ~

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~l REPORTABLE OCCURRENCE 335-76-42 LXCENSEE EVENT REPORT PAGE TWO Event Descri tion (continued) automatically before the pressure in containment returned to

'atmospheric pressure. The Containment Vacuum Relief Valves open automatically to protect the containment structure from, excessive vacuum. They also close automatically as the containment pressure returns to atmospheric pressure, thereby preventing outflow of air from containment to the outside atmosphere. There have been two previous occurrences during which operation was in conflict with Technical Specification 3.9.4'(335-76-1 and 335-76-4). One of them (335-76-4) was also due to the opening of a Containment Vacuum Relief Valve. (335-76-42)

Cause Descri tion (continued) relief valve due to vacuum in containment. No further action is planned pending disposition of the proposed amendment.

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" O. BOX 013100, MIAMI, FLORIDA 33101 y@Vliz~

FLORIDA POWER 5 LIGHT COMPANY September 3, 1976 PRN-LI-76-234 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 335-76-42 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: AUGUST 3, 1976 CONTAINMENT VACUUM RELIEF VALVE 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, A. D. Schmidt Vice President Power Resources MAS/cpc Attachment.

cc: Jack R. Newman, Esquire Director, Office of Inspection and Enforcement (30)

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

HELPING BUILD FLORIDA

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LICENSEE EVENT REPORT CONTROL BLOCK: (PL~ f PRINT ALL REQUIRED!NFORMATION) 6 UCENSEE LICENSE EVENT NAME UCENSE NUMBER LSLS l TYPE TYPE

[001] F 0 00 00 0 0 0 41 11 1 ~P 89

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,7 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE OOCKET NUMBER EVENT OATE REPORT OATS

[0D1]cuN'T L L 0 5 0 0 3 3 5 0 8 0 3 7 6 0 9 0 3 7 6 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION Qo2 With the reactor shutdown for fuel ins ection a containment ur e fan was 7 8 9 80 Q~g started and sufficient vacuum was obtained in containment to cause a 7 8 9 80 toD4] Containment Vacuum Relief Valve to o en. This was in conflict with 7 8 9 80

~05 Technical S ecification 3.9.4. Core alterations were sus ended the con-7 8 9 80 7

tODQ 8 9 tainment ur e fan was t 80 FAME SYSTEM CAUSE COMPONENT CCMPON ENT COOE CODE COMPONENT COOE SUPPLER MANUFACTURER VGLATION 7

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~F 11 12 z z z z z 17 z 9 9 47 48 CAUSE OESCRIPTION Qg8 9 Containment ur e was started and s ff' nt vac 0 7 80 rOOI Containment Vacuum Relief Valve. On Au ust l6 1976 a Technical S ecific 7 8 9 80 Q~O tion amendment was re uested to ermit automatic actuation of a vacuum 7 89 FACIUTY METHOO OF 80 STATUS 56 POWER OTHER STATUS OISCOVERY OISCOVERY OESCRIPTION 7 8 9 3 ~00 0 Fuel Iue ectic 44 a N A 10 12 13 45 46 80 FORM OF AC aaY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Hg z N/A N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMSER TYPE OESCRIPTION Pg ~oo 7 89 o ~z N A 11 12 13 80 PERS'ONNEL INJURIES NUMBER OESCRIPTION

~4 Locoo I N A 7 8 9 11 12 80 PROBABLE CONSEQUENCES N A 7 8 9 80 LOSS OR OAMAGE TO FACILITY TYPE OESCRIPTION z N/A 7 89 10 80 PU8LICITY N A 7 8 9 80 AOOITIONAL FACTORS PQ8 7 89 80 Q~g 7 89 80 NAME. M. A. Schoppman 305/552-3779 PHONEI CPO dd'I ~ ddl

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REPORTABLE OCCURRENCE 335-76-42 LICENSEE EVENT REPORT PAGE TWO Event Descri tion (continued) automatically before the pressure in containment returned to atmospheric pressure. The Containment Vacuum Relief Valves open automatically to protect the containment, structure from excessive vacuum. They also close automatically as the containment pressure returns to atmospheric pressure, thereby preventing outflow of air from containment to the outside atmosphere. There have been two previous occurrences during which operation was in conflict with Technical Specification 3.9.4 (335-76-l and 335-76-4). One of them (335-76-4) was also due to the opening of a Containment Vacuum Relief Valve. (335-76-42)

Cause'Descri tion (continued) relief valve due to vacuum in containment. No further action is planned pending disposition of the proposed, amendment.

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