ML20004B417

LER 81-037/03L-0:on 810421,control Room Filter Train Found Inoperable Due to Charcoal Inability to Remove 90% of Methyl Iodide.Caused by Paint Fumes Passing Through Filter Train When Sys Was in Recirculation Mode.Charcoal Replaced

ML20004B417
Person / Time
Site:	Hatch
Issue date:	05/21/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004B416	List: 05000321/LER-1981-037, Forwards LER 81-037/03L-0 05000321/LER-1981-037-03, /03L-0:on 810421,control Room Filter Train Found Inoperable Due to Charcoal Inability to Remove 90% of Methyl Iodide.Caused by Paint Fumes Passing Through Filter Train When Sys Was in Recirculation Mode.Charcoal Replaced
References
LER-81-037-03L-01, LER-81-37-3L-1, NUDOCS 8105280209
Download: ML20004B417 (2)

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74 75 31E f'OH T D AT E tio i 8 00 _ te l DOLKET NUVULH EVENT DESCitlPiloN AND PRODABLE CONStoUENCES h O a L0n 4-21-81, wi th Uni t 1 shutdown for a ref ueling/ torus modi fication out- l 10131 gqe it was determined that a charcoal sample taken from control room l 0 . Ifil te r train Z41-D004B when tested per HNP-1-397S, " Testing of CR and I o s ISBGT Filter by Vendor", had not met the 90% methyl iodide removal as i 101c 1 [r_e_q u i re d by HNP-1 Tech Specs 3.1.2.A.2 and HNP-2 Tech Specs 4.7.2.C.2 I This is a nonrepetitive event for this syste_m. I rTIT] [( 77. 9 % a c t u al removal).

I O la l IThere were no effects upon public heal th and safety as a result of this event. 60I 7 8 9

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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O IThe failure of 'the control room filter train 1241-D004B was due to the I 11111Icharcoal's inability to remove 90% of methyl iodide from a laboratory I li 121 lanalysis of representative sample. The f aulty charcoal was removed 1 lilal land replaced by new charcoal of which a sample was sent offsite for [

' li te l llab analysis of methyl iodide removal. IZ41-D004B passed the test at 99.4%. l l7 8 9 90 s1 A S  % POWER OTHE R STATUS blSC R DISCOVEHY DE SCHiPTION i Ii I s i LLLj@ l 01 01 ol@l NA j i Bl@l Test Results to Engineer a

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cl LER #: 321/1931-037 Licensec: Georgia Power Company Facility Name: Edwin I. Ilatch Docket #: 50-321

• Narrative Report for LER 50-321/1981-037

- On 4-21-81, with Unit 1 in cold shutdown for a refueling and torus' modification outage, a laboratory analysis of a charcoal-sampic taken frou control room filter train Z41-D004B was found to remove 77.9% of methyl iodide instead of the 90.0%

requited by llNP-1 Tech Specs 3.1.2.A.2 and llNP-2 Tech Specs 4.7.2.C.2.. The faulty charcoal was removed and rep? aced . by new charcoal. The new charcoal was tested por HNP-1-3975,

" Testing of Control Room and SBGT Filter Train by Vendor", and passed the DOP and Icakage test. A charcoal sampic was sent offsite for a laboratory analysis for methyl iodide removal.

The charcoal passed the test with 99.4% methyl iodido remov-al. The failure of the original charcoal was apparently due to paint fumes passing through . the filter trains while the control room ventilation system was in the recirculation mode. 1Z41-D004A was tested on 3-19-81, and was certifica according to llNP-1-3975 ~on .4-22-81. This is a nonrepetitive event for this system with no effects upon public health and safety.

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