ML19308D517

RO-77-85:on 770715,methyl Iodine Removal Efficiency Found Below Tech Specs Requirements During Reactor Bldg Charcoal Filter Bank Testing.Caused by Deteriorated Charcoal Due to Site Flue Gases & Air Pollutants.Charcoal Replaced 770806

ML19308D517
Person / Time
Site:	Crystal River
Issue date:	08/08/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D516	List: ML19308D515 ML19308D517
References
NUDOCS 8002280832
Download: ML19308D517 (2)

Text

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r CoNTROt stOCx:l , l l l l l L 2ASE PRINT ALL REnUIRE3 INFCRA1AT!:l:.~d)

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[l F l L l'C l R l P l 3 l l0l0l-l0l0l0l0l0l-l0l0l l 4 l 1 l1 l1 l1 l l0l3l 32 Y'^ 8 9 14 15 25 26 30 31 CATEccRY TYPE NH$E QCCKET NUMBEA EVENT CATE . AEPoAT CATE hCONT l l .l lLl l 0 l 5 l 0 l-l 0 l 3 l 0 l 2 l l0 l7 II l5 l7 l7 l l0 l8 l0 l8 l 7l 7l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION o [During the performance of the normal testing sequence of the Reactor Building charcoal fil}-

7 c3 ter bank, the methyl Iodine removal efficiency was determined to be less than 99% con- *j 7 89 90 g l trary to Tech Spec 3.6.4.2. Redundancy NA. First time occurrence. The filter bank l 7 89 80 g l will 'oe restored operable on 10 August 1977 after completion of final testing. l 7 89 EO gl (LER 77-85) l 7 89 pm,it 50 SEE" cc"c'[ couPoNENT CCCE SUPRAR ACTUMA VOLATCN O l Sl Cl g lF lI lL lT l E l Rl lNl lF l0 l3 l0 l lNl 7 89 10 11 12 17 43 44 47 48 ,

CAUSE DESCRIPTION 9 e l The presence of site flue gases and air pollutants deteriorate the charcoal and its lf 7 89 50 09 l impregnaat. The charcoal was replaced on 6 August 1977. l 7 89 60 l l

'sEl eTwEn STATUS C CCVE Y CEiCoVERY CESCRPECN lE l l .s PowEn0l 9l 9l NA l l lBl l- NA l 7O 9 ,

10 12 13 ,

44 45 46 80 AucuNT c7 ACTonTY LCCATCN oF AELEASE 12 $ESSEEo W lZl oYEAsE l NA l 44 l

45 NA 80 l

7 8 9 10 11 PERSONNEL EXPOSURES NUMBEA TYPE DESCAPTON 1 l 0l 0l 0l lZI l NA 60 l

7 89 11 12 13 PERSONNEL INJURIES NUMBER CEScRPTON 14 l 0l 01 0l l NA l 1 7 89 11 12 60 OFFSITE CONSEQUENCES

]E l NA l 7 89 80 LOSS GR OAMAGE TO FAC:LITY TYPE CESCRPTCN Q]

7 89 l

10 NA LO l

PUSUC!TY NA Ql 7 89 'O l

ACOlTIONAL FACTORS g Q Q 2 2 8 ()

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,g l SEE ATTACHED SUP,PLEMENTARY INFORMATION I

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NAME:

W. P. Stewart PHONE: 813/866-4159

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SUPPLEMENTARY IN M RMATION v 1.

Report No.:

50-302/77-85

2. Facility: Crystal River Unit #3

3. Report Date: 8 August 1977 4

4. Occurrence Date: 15 July 1977

5. Identification of Occurrence:

The Reactor Building charcoal efficiency was less than 99% methyl Iodine removal contrary to Technical Specification 3.6.4.2.

6. Conditions Prior to Occurrence:

Mode 1 power operation

7. Description of Occurrence: ..

At 1000 when performing the normal testing sequence of charcoal filter bank AHFL-1, f the methyl Iodine removal efficiency was determined to be less than 99%. The 30 day action statement of Technical Specification 3.6.4.2 was entered. The charcoal was renewed on 6 August 1977 and will be restored operable upon final testing.

8. Designation of Apparent Cause:

The flue gases and other site airborne pollutants deteriorate the charcoal and its impregnant.

9. Analysis of Occurrence:

There was no safety hazard to the plant or public.

10. Corrective Action:

The charcoal was replaced on 6 August 1977.

11. Failure Data:

This was the first occurrence of this event.

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