ML18227A430

Letter Transmitting Licensee Event Report, Low Boron Concentration Occurred in Unit 4 on 6/12/1976 in Accordance with Technical Specification 6.9.2 to Provide Prompt Notification

ML18227A430
Person / Time
Site:	Turkey Point
Issue date:	06/25/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/RGN-II
References
PRN-LI-76-164
Download: ML18227A430 (7)

Text

NRC FoRM 195 U.S. NUCLEAR REGULATORY C SION DOCKET NUMBER I2-76 I A 50-251 FILE NUMBER NRC D I STR I BUT ION Fo R PART 50 DOC K ET MATER I AL INCIDZFZ REPORT TOI FROM: DATE OF DOCUMENT Florida'Power- & Light Company 6/25/76 Mr,'Norman C, Moseley Miami, Florida DATE RECEIVED A. D, Schmidt 7/6/76 KLEVTER ONOTOR IZED PROP INPUT FORM NUMBE R OF COP I ES RE CE I V E D OORIGINAL @UNCLASSIFIED No original SCOP Y DESCRIPTION ENCLOSURE Ltr.. trans the following: Licensee Event Report ( RO 50-251/76-5) on 6/12/76 concerning the boron concentration of the boron in]ection tank and the "B," Soric acid storage tank were below the, tech spec limit.

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FLORIOA PO'AER 5 LIGHT CO>.TRACY

'June 25, 1976 PRN-LI-76-164 Mr.'orman C. Moseley, Director, Region Office of Inspection and Enforcement ~

II U. S. Nuclear Regulatory'ommission 230 Peachtree Street, N. Wot Suite 818 Atlanta, Georgia 30303

Dear Mr. Moseley:

REPORTABLE OCCURRENCE 251-76-5'URKEY POINT UNIT 4 DATE OF OCCURRENCE: JUNE .12, 1976 LOW BORON CONCENTRATION

.The attached Licensee Event. Report is being submitted in

'accordance with Technical Specification 6.9.2 to provide

. prompt notification of the subject occurrence.

Very truly yours, POCKETED' NIIIIEI

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A. D. Schm'idt Vice President Power Resources 4ItL )IS>6=,

U:5 ~ NVCIEAR RECIlihTDRT COMMIEE MAS/cpc EocIIon ID'IaII v,

Attachment cc:. Jack R. Newman, Esquire Director, Office of Inspection and Enforcement'(40)

Director, Office of Management Information and

..Program Control (3)

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. 6'784 HITLPING BUILD FLORIDA

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1 6 (P~ PAINT ALL AEQLIIAED INFORMATION/

'0 UCENSE EVENT

'ICENSEE gij Ez'p 00000, NAME LICENSE NUMBER TYPE TYPE s 4. o 0 0 1 1 1 ~01

,7 89 .. 14'5 25 26 30 31 32 REPORT AEPOAT CATEGORY TYPE'OURCE OOCKET NUMSEA ~ EVENT OATE

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REPORT OATE 6 2 5 7 6

,,7 8 57 58 59

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p 60 68 69 74 75 80 EVENT'ESCRIPTION

[oats] tha the bo on concentration of the boron 7 8 9 80 IOO~] in ection tank BIT and the "B" boric acid stora e tank (BAST) were 7 89 80 below the Technical Sp'ecification limit of 20,000 ppm. This had

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7 8 9 80 7 's discussed in 7 8 9 80 l006 Re ortable Occurrence 251-76-4. C'orrective action was to initiate a 7 8 9 PRME 80 SYSTEM CAUSE COMPONEs4T COMPONENT CODE COOS COMPONENT COOE SUPPLER MANUFACTURER VIOLATE)N Rl8 9L$10J~H A L 02

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.11 CAUSE DESCRIPTION 12 V E X 17, 43 44 D .5 47 Qo g [ Dilution of the Unit 4 BIT was caused by inleakage from the RNST via the 7 8 9 60 toOj9 BIT inlet and outlet isolation valves. Since the BIT was bein re-7 8 9 80

~10 Il A a s diluted.

7 89 METHOO OF 80 OTHER STATUS OLSCOVEAY OISCOVERY OESCRIPTION pig A N A 7 8 9 10 12 13 45 46 80 FORM OF ACTIVITY COATENT RELEASED OF AELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE KG~ Lzl L~J N/A N/A 7 8 9 10 11 80 PERSONNEL EXPOSURES 7

t"g 8 9

~I JgJ NUMSEA

. 11 TYPE Z

12 13 OESCRIPTION N A 80 PERSONNEL INJURIES NUMSER OESCAIPTION

'7 f47 LoaooJ 89 11 12 80 PROB44IBLE CONSEQUENCES Qs] N 7 89 80 LOSS OR OAMAGE TO FACILITY TYP OESCAPTION z N A 7, 89 10 =

80 PUBLICITY N A 7 89 ~ 80 AOOITIONAL FACTORS" Eee' e 2. for continuation of Event Descii tion and Cause Description; 7 89 60 7 89 80

'M. A. Scho man PHONE. 305 552-3779 CFO 4A'I ~ E ~ 7

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REPORTABLE OCCURRENCE 251-76-5 LICENSEE EVENT, REPORT PAGE TWO Event. Descri Cion '(cont'inued) shutdown in accordance with Administrative Procedure 103.8 and to commence adding a concentrated boric acid solution to the tanks.

The boron concentration of the tanks, was returned to within specification and normal operation was resumed. ('251-76-5).

Cause Descri tion (continued) f I

Maintenance was performed on the inlet isolation valves to stop

. the leakage. Leakage past the outlet isolation valves was stopped by isolating the leakoff line from those, valves.

Similar cases of BIT dilution have occurred, however, this was the first, occurrence attributable directly to leakage past the isolation valves. .Also, a situation in which cross dilution occurred between a BIT and a BAST was previously discussed in report 251-75-12.

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