ML19340A459
| ML19340A459 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 09/09/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19340A456 | List: |
| References | |
| NUDOCS 8003260798 | |
| Download: ML19340A459 (2) | |
Text
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LEENSE EVENT
'N tCENSEE LCENSE NUMBER TYPE TYPE
] (f l L l Cl R l P l 3 ]
l 0 l 0 l-l 0 l 0 l 0 l 0 l 0 l-l 0 l 0 l l411l1l1l1l l0l1l NAME 25 26 30 31 32 89' 14 15 DOCKET NUMBER EVENT DATE REPCRT CATE
] CONT l -l -l W
l0 l5 l0 l-l0 l3 l0 l2 l l0 l9 l0 l3 l 7l 7l l 0 l 9 l0']9 l7 l7 CATEGORY T PE u
u 57 58 59 60 61 68 69 74 75 EVENT DESCRIPTON 3 l In mode 1 operation, an unplanned radioactive g... release to the Auxiliary Building -
o Redundancy N/A.
}loccurredcontrarytoEnvironmentalTechnicalSpecification5.6.2.A.
C9 E
The sixth occurrence of this event.
R9 j l The guxiliary Building was evacuated immediately.
B9 (LER 77-103E)
)l E.
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-E a9 VOLATCN C DE ODE COMPONENT CODE l l'M] Bl Q lZ l Zl Zl Zl ZI Zl
[Z,j lZ l 9l 9l 9l lN l 39 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION
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l [ This occurrence was due to the concentrated waste storage tanks loop seals being blown.
E: l l l The loop seals were re-established. Proposed. system modifications should preclude j
19 6;
,g 1l recurrence.
e; I I9 METHOO OF STATUS
% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTON FACILrry L
9 10 12 13 44.
lAj l High radiation on RMA-2g & 3G shutting y
l0l9]9] l NA l
SC I 45 46.(See additional factors 18)
~
gAMjF LOCATCN OF RELEASE AMOUNT OF AcTMTV
'OF RELEASE l 57 curies noble gas l
l Release to Aux. Bldg. vent to atmosphere RELEASED W
y BC j 9
10 11 44 45 j
PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTON Ininini Iz_l l
NA 9
11 12 13 PERSONNEL INJURIES
- NUMBER DESCRIPTON I
l0l0l0l'l NA 6C 9
11 12 OFFSITE CONSEQUENCES 9
yl LOSS OR OAMAGE TO FACIUTY TYPE DESCRPTON d (l NA 9
10 PUBUCITY NA l
8003260'7 ADDITIONAL FACTORS l
off Auxiliary Bld;; ventilation fans.
/
9 SEE ATTACHED SUPPLEMENTARY INFORMATION l
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m:L m-
-m SUPPLEMENTARY INFORMATION Report No.:
50-302 /77-103E Facility:
Crystal River Unit #3 Report Date:
9 September 1977
~
Occurrence Date:
3 September 1977 Identification of Occurrence:
Unplanned gu release reported in accordance eith ETS 5.6.2.(A).
Conditions Prior to Occurrence:
Normal power operation. Prepering to vent Makeup Tank via low pressure Waste Gas Header..
Description of Occurrence:
At 0716 upon venting the Makeup Tank to the low pressure Waste Gas Eeader, airborne radiation monitors RMA & RNA-3 alarmed ' actuating appropriate ventilation trips.
Subsequent investigation revealed that the source of the release was the loop seal on the miscellaneous Waste Evaporator. Loop seal was re-established upon discovery.
The maximum release' rate at the peak of the discharge profile was 0.53% of the most restrictive limit set forth in Environmental Technical Specification 2.4.2.A(1).
System modifications to prevent occurrences of this nature have been initiated and -
submitted to Production Engineering.
Designation of Apparent Cause:
Pressure in the low pressure Waste Gas Header exceeded loop seal capability.
Analysis of Occurrence:
There was no consequence to the health or safety of the plant or public because of the very small release rate.
Corrective Action:
Proposed modifications noted in the Description of Occurrence should preclude recur-rence of this nature.
[
Pailure Data:
This has been a repetitive problem.
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