ML18227A431
| ML18227A431 | |
| 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: ML18227A431 (5) | |
Text
FLORIDA POWER & LIGHT COMPANY June 25, 1976 PRN-LI-76-164 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 251-76-5 TURKEY 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, A. D. Schmidt Vice President Power Resources MAS/cpc 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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UCENSE TYPE EVENT TYPE UCENSE NUMBER 0 0 0
0 0
0 0 0
4 1
1 1
~01 30 31 32 25 26 LlCENSEE EVENT REPORT SE PRINT ALLREQUIRED INFORMATION)
REPORT REPORT CATEGORY TYPE SOURCE
~01 OON'T~
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7 8
57 58 59 60 61 EVENT OESCRIPTION OOCKET NUMBER EVENT DATE REPORT DATE 0
6 1
2 7
6 0
6 2
5 7
6 68 69
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74 75 80 Jog ha the b ron concentration of the boron 7
8 9 80 in'ection tank B):T and the "B" boric acid stora e tank BAST) weri 7
8 9 toO4J below the Technical S ecification limit of 20,000 ppm.
80 This had 7
8 9
[oas]
80 iscus d in 7
8 9 80
[OO~]
Re ortable Occurrence 251-76-4.
Corrective action was to initiate a 7
8 9
- SYSTEM, CAUSE CODE CODE COMPONENT
'[OD7] ~~H E
V A L 7
8 9 10 11 12 CAUSE OESCRIPTION tOOI Dilution of the Unit CODE E
X 17 PFOM E COMPONENT SUPPUER COMPONENT MANUFACTURER D
0 2
5 47 80 4 B):T was caused by inleakage from the RWST via the 7
8 9 tOOI B):T inlet and outlet isolation valves.
Since the BIT was bein 7
8 9 s
o diluted.
80 re-80 OTHER STATUS N A 7
8 9 LOSS OR OAMAGE TO FACILITY TYPE OESCRIPTION
~z 7
89 10 PUBLICITY 7
89 7
89 FACUTY STATUS
% POWER IH kJ ~0 7
8 9
10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY I?~I L~j LiJ N/A 7
8 9
10 11 PEFISONNEL EXPOSURES NUMBER TYPE OESCRIPTION J~~
z 7
89 11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTION I?4] LOOooJ 7
8 9 11 12 PROamLE CONSEOUENCES METHOO OF DISCOVERY 44 45 46 44 45 N A N A N
N A N A OISCOVERY DESCRIPTION N A LOCATION OF RELEASE N/A 80 80 80 80 80 80 80
~80 AOOITIONAL FACTORS'I See a e 2 for continuation of Event Descri tion and Cause Description.
7 89 80 7
89 M. A. Scho man PHONE 305 552-3779 80 CPO ddI e ddT
"REPORTABLE OCCURRENCE 251-76-5 LICENSEE EVENT REPORT PAGE TWO Event Descri tion (continued) 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)
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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