ML18227A432
| ML18227A432 | |
| 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-76-162 | |
| Download: ML18227A432 (7) | |
Text
NRC FQRM 195 U.S. NUCLEAR REGULATORY CO y-7BI NRC DISTRIBuTION FoR PART 60 DOCKET MATERIAL DOCKET NUMBER 50-.251 FILE NUMBER INCIDENT REPORT TO:
Mr, Norman C
Moseley FROM:
Florida 'Power-6 Light Company Miami., Flori;da Mr A. D. Schmidt DATE OF DOCUMENT 6/25/76 DATE RECEIVED 7/6/76 PALETTE R OORIGINAL PfCOP Y DES C R IP TI0 N ONOTORIZED glfJNCLASSIFIED PROP INPUT FORM ENCLOSU RE NUMBE R OF COP IES RE CE IVE D No original Ltr trans the followi,ng:
PXANT NAME'urkey Point 84 (1-P)
Li.censee Event Report (RO 50-251/76-4) on 6/ll/76 concerning boron concentration of the boron in]ection tank & two of the thiee boric acid storage tanks being below thh lower tech spec limit.
ACKNOWLEDGED (2-P)
. gP gaT REMOVE.
NOTE:
IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J
.COLLINS EIRANCH CHIEF:
W CYS FOR ACTION LIC..ASST.:
Lear Parrish FOR ACTION/INFORMATION 7
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SCHROEDER IPPOLITO HOUSTON
'NOVAK CHECK GRIMES CASE HANAUER-TEDESCO MACCARY.
EXSENHUT SHAO VOLLMER EJNCH KREGER J. COLLINS LPDR: Miami Florida TXC:
EXTERNAL DISTRIBUTION
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- )::"-.->!..n(P, FLORIDA POWER 5 LIGHT COMPAi"IY June 25, 1976 PRN-LI-76-162 Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission
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230 Peachtree
- Street, N. W., Suite 818 Atlanta, Georgia 30303
Dear Mr. Moseley:
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';rP-REPORTABLE OCCURRENCE 251-76-4 TURKEY POINT UNIT 4 DATE OF OCCURRENCE:
JUNE ll, 1976 LOW BORON CONCENTRATION
'he 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, D. Schmidt
-Vice President Power Resources pocrs1S~
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'1 +I +@goo MAS/cpc Attachment cc:
Jack R.
Newman, Esquire Director, Office of Inspection and Enforcement (40)
Director, Office of Management Information and Program Control (3)
~ H LPING BUILD FLORIDA
0 t~
LlCENSEE EVENT REPORT
[oaf 7
89
.CONTROL BLOCK:
1 UCeNSEE NAME p
S4 00 14 15 6
UCENSE NUMBER 0
0 0
0 0 0 0
UCENSE TYPE EVENT TYPE 4
1 111
~01 26 30 31 32
[PL PAINT ALL AEGIJIAED INFOAIIAATION)
. CATEGORY REPORT
~01 cosv 7
8 57 58 59 REPORT SOURCE L
0 60 61 OOCKET NUMBER 5
0 0 2
5 0
68 EVENT OATE REPORT OATE 0
6 1
1 7
6 0
6 2
5 7
6 69 '4 75 80 EVENT DESCRIPTION
[oaf Durin stead state o eration, routine sampling showed that, the boron 7
8 9 80 I concentration of the boron in'ection tank (BIT and two of the three 7
89 80
~4 o 'c acid stora e
anks BAST was below the lower Technical ecifica-7 8 9 80 Jog tion limit of 20,000 m.
Corrective action was to initiate a shutdown 7
8 9
[ODg i accordance with Administrat' Proc dur 103 8
nd e c 80 7
89 PRME SYSTEM CAUSE COMPONENT COBE COOE COMPONENT COOE SUPPUER LSSEI E
v A L v E X
A 7
8 9 10 11 12 17 43 CAUSE DESCRIPTION The exact cause of the BIT dilution 89 tool COMPONENT MANUFACTURER D
0 2
5 44 47 Y
48 was not found until the roblem had 80 80
'7 89 Unit 4 BIT was caused b
inleaka e from the RWST via the BIT inlet and 80 OTHER STATUS N A 7
8 9 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION
~z 7
89 10
'UBLICITY 7
89 FACILITY
'STATUS POWER Q'7" LEJ
~io o
7 8
9 10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY Elm LJz Lzl
'N A 7
s s
10 11 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION
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8 9 11 12 13 PERSONNEL INJURIES E04 LZLJ 7
89 11 12 PROBABLE CONSEQUENCES Qg METHOO OF DISCOVERY 44 45 46 44
'45 N A N A N A OISCOVERY OESCRIPTION N A LOCATION OF RELEASE N A 80 80 80 80 80 80 80 7
89 ADDITIONAL FACTORS'18 See Pa e
2 for continuation of Event Descri tion and Cause Descri tion.
7 89
~80 80 7
89 NAME N.
A ~
S choppman PHONE 3 05/5 52 3 7 7 9 80 CPO ddI>> ddT
wA REPORTABLE OCCURRENCE 251-76-4 LICENSEE EVENT REPORT PAGE TWO
'Event Descr'i tion (Continued' 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.
A similar problem experienced by Unit 3 is reported in Reportable Occurrence 250-76-4.
(251-76-4).
Cause Descri tion (Continued) outlet isolation valves.
Since the BIT was being recirculated with the BAST system, two of the three BAST's were also diluted.
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.
Several cases of BIT dilution have occurred, however, this was the first occurrence attributable directly to significant 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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