ML19308D461

RO-77-105E:on 770901,reactor Bldg Purged Unmonitored Contrary to Ets.Caused by Failure to Ascertain Monitor Operability Prior to Purge Initiation.More Stringent Procedure Adherence Will Be Followed

ML19308D461
Person / Time
Site:	Crystal River
Issue date:	09/12/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D441	List: ML19308D440 ML19308D461
References
NUDOCS 8002280773
Download: ML19308D461 (2)

Text

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, 31 32 CATEGo4Y "'tyd# E[EEI DOCKEf NUMBER EVENT DATE REPCRT DAtE O 1 CONT l -l -j _ } Tl lL l l 0 l 5 l 0 l -- j 0 l 3 l 0 l 2 l l 0 l 9 l0 l1 l7 l 7l l 0 l 9 l 1 l 2 l 7 l 7.

7 0 57 58 SS GO 61 68 69 74 - 75 EVENT DESCArPTION DE I in mode 1 operation, the Reactor sutiains was purged for 5 minutes unmonitored contrary 7 89 -

g l to E.T.S. 2.4.2.G and S.T.S. 3.3.2.1, Table 3. 3-4, Redundsmcy N/A. Second occurrence as 7 89 g l reported by LER 77-74E of 26 July 1977. Upon discovery the purge was terminated inanediately 7 8s -

0 [ and RM-Al restored operable.

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@l 7 89 (LER 77-105E)

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[Z l Zl Zl Zl zlJ17 12 l Zl l Z l9 l 9l 9l 44 lYl 11 43 47 48 CAUSE DESCRIPTION *8 Q [ Failure to ascertain operability of rionitor operation prior to initiating Reactor Building -i 7 89 t:

Q l purge as required by operating procedure. A more stringent adherence to procedure will be 7 89 s 3o lfollowed to preclude recurrence.

METH00 OF Sverus  % POWER 07HEA STATUS 9eaatnv Or5COVERY CIScCVEnv DESOAinTUN lEl l 1l 0l 0 l l NA l l Al l NA 7 8 9 10 12 13 44 45 48 E-scimT< conrENr N!'.EA5 D Of NtLtJ.5E AMOUNT of ACTMTV LOCATCN OF MLEASE 12 C y l3.39 x 104 uci nobin gas] l Reactor Building vent to at:nospherc 7 o 9 10 11 44 45 e PERSONNEL EXPOSUAES ,

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7 89 6-LOSS OR DAMAGE TO FACluTY TY PE DESCRPTCN .

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0228o 773 ADDITICNAL FACTORS i t,.s

]l 7 09 SEE ATTACHED SUPPLFMENTARY INFORMATION NAME W. P'. Stewart t __ pnant: 813/866-4159

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SUPPLEMENTARY INFORMATION

1. Report No.: 50-302/77-105E

2. Facility: Crystal River Unit #3

3. Paport Date: 12 Septenber 1977

4. Occurrence Date: 1 September 1977 (discovered 2 September 1977)

5. Identification of Occurrence:

An unmonitored Reactor Buildi tg purge contrary to Environmental Technical Specitication 2.4.2.G and Standard Technical Specification 3.3.2.1, Table 3. 3-4. l j

6. Conditions Prior to Occurrence: I Mode 1 power operation. .)

7. Description of Occurrenec:

3 At 1700 a purge of the Reactor Building was started with radiation monitor RMA1 sampling pump inoperabla. This constituted an ugmonitored radioactive release for a period of 5 minutes, at a release rate of 1.13x10' microcuries per second. Upon discovery of the inoperable monitor, the purge uns terminated immediately and RM-Al restored operable.

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VDesignation of Apparent- Cause:

The cause of this event was the failure to escartain operability of monitor operation prior to starting the purge as required by Operating Procedure OP-417.

9. Analysis of Occurrence l

There was no safety hazard to the plant or public based upon known activity in the J Reactor Building prior to purging. l

10. Corrective Action:

Discussed OP-417 purge requirements with all personnel concerned and a more stringent  ;

adherence to Procedures will be followed. OP-417 has been changed to require a visual confirmation of RM-Al operability before initiating a Reactor Building purge.

11. Failure Data:

This was the second occurrence of this event as reported by LER 77-74E dated 26 July 1977.

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