ML18227A433
| ML18227A433 | |
| 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: ML18227A433 (6) | |
Text
FLORIDA POWER 8I LIGHT COMPANY June 25, 1976 PRN-LI-76-162 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 251-76-4 TURKEY POINT UNIT 4 DATE OF OCCURRENCE:
JUNE ll, 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, 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)
HELPING BUILD FLORIDA
t 4 4
~
~
C J
LICENSEE EVENT REPQ
~
V CONTROL BLOCK:
[oa~j 7
89 LCENSEE NAME P
S 4
14 0
0 15 REPORT SOURCE L
0 60
. 61 REPORT
. CATEGORY TYPE
~a~ coN~~
7 8
57 58 59 OOCKET NUMSEA 5
0 0 2
5 0
68
~ EVENT OATE REPORT OATE 061176062576 69 74 75 80 fPLEA8E PAINT ALLREQUIRED INFORMATION) 6 UCENSE EVFNT LICENSE NUMBEA TYPE TYPE 0
0 0
0 0 0 0
4 1
1 1
1 Loocl~j 25 26 30 31 32 EVENT OESCRIPTION
[0D2J Durin stead state -o eration, routine sampling showed that the boron 7
8 9 80
[oO3]
concentration of the boron in'ection tank (BIT and two of the three 7
89 80
~4 o
d to a nks BAST was b low the low r Tech 'c S
cifica-7 8 9 80
[oas]
tion limit of 20,000 m.
Corrective action-was to initiate a shutdown 7
8 9 t0ag
'n a cordance with Administrat 80 roc dur 1
an 7
8 9 FAME SYSTEM CAUSE COMPONENT COOE COOS COMPONENT COOE SUPPUER
[007] ~~H
~E V
A L V E X
A 7
8 9 10 11 12 17 43 CAUSE OESCRIPTION QO 8 The exact cause of the BIT dilution 7
8 9 COMPONENT MANUFACTURER D
0 2
5 44 47 Y
48 was not found until the roblem had 80 80 7
8 9 80 Q1 0 Unit 4 BIT was caused b
inleaka e from the RWST via the BIT inlet and OTHER STATUS N A AMOUNT OF ACTIVITY N A PRPBABLE CONSEQUENCES Qs]
7 89 LOSS OR DAMAGE TO FACILITY TYPE OESCAIPTION z
7 89 10 PUBLICITY 7
89 FACILITY STATUS 96 POWER
~I1 E
~10 0
7 8
9 10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE Qg z
z 7
8 9
10 11 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION P~g ~00 o
~z 7
89 11 12 13 PERSONNEL INJURIES EQ4 LOLt~
7 89 11 12 METHOO OF OISCOVERY b
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 AOOITIONAL FACTORS'~8 See Pa e
2 for continuation of Event. Descri tion and Cause Descri tion.
7 89 80 80 7
89 NAME:
M. A. Schoppman 305/552-3779 80 GPO 8GI>> OGT
I l
'll
~
g
~
~
REPORTABLE OCCURRENCE 251-76-4 LICENSEE EVENT REPORT PAGE TWO Event Descri 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.
~ ~
j'