ML18142B879

LER 1975-008-00 for R. E. Ginna, Degradation of Charcoal Filter Iodine Removal Efficiency

ML18142B879
Person / Time
Site:	Ginna
Issue date:	04/17/1975
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1975-008-00
Download: ML18142B879 (6)

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NBC DIS~~IBUlloN FOR PnfeT 50 DOCKET f~",TERIAL

{TEMPORARY FORivl)

OONTROL No:

F}LF IHCI1)i'.1P'EPORT FILE

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FROM: Rochester & Electric Co. DATE OF DOC DATE R EC'D LTH BPT, OTHER Roches ter, .N.Y. 4-17-75 5~1 75 XX O.R I G CC OTHER SFNT AEC PDR James P. O'Reilly 1 Signed SFNT LOCAL PDR C~~SS UiVC LASS PROP INFO INPUT NO CYS REC'D DOCKET NO:

XXXX 1 50-244 DESCRIPTION: ENCLOSURES:

Ltr. trans the following.... Abnorm. Occurr. 8 75-'08, on 4-,8+5, concerning Molecular Iodine Removal Tes,ting.......','qlLJS

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ROCHESTER GAS AND ELECTRIC CORPORATION 0 89 EAST AVENUE, ROCHESTER, N.Y. 14649 LEON D. WHITE. JR. TK(.KPNONK VICE PRKSIDKNT ARKA COOK 7ld 546-2700

~Apri:1 1-7-, 1975 b,

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0 @Q Mr. James P. O'Reilly, Director S. Nuclear Regulatory Commis 'on

+4'.

Office of Inspection and Enforcem P$

Region I 631 Park Avenue

+If';W King of Prussia, Pennsylvania 19406

Subject:

Abnormal Occurrence 75-08, Degradation of charcoal filter iodine removal efficiency R. E. Ginna Nuclear Power Plant, Unit No. 1 Docket No. 50-244

Dear Mr. O'Reilly:

In accordance with Technical Specifications, Article 6.6.2a, the attached report of Abnormal Occurrence 75-08 is hereby submitted. Two additional copies of this letter and the attachment are enclosed.

Very truly yours, L. D. White, Jr,.>>

Attachment cc: Mr. Donald P. Knuth (40)

l

~ LICENSEE EVENT REPOR ~

CONTROL BLOCK: (PLEASE PRINT ALL REQIJIRED INFORMATION)

LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE Ioag N Y R E G 1 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~01 7 89 14 15 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER . EVENT DATE REPORT DATE

[001]cONT ~MI T L 0 5 0 0 2 4 4 0 4 0 8 7 5 0 4 1 7 7 5 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION

[oO~) During refueling shutdown the post accident filters charcoal samples showed "A" filter 7 8 9 80

[QD3] charcoal molecular iodine removal efficienc of 99. 4%, while for "B", above the 7 89 80 Qo74 acceptance criteria of 99.9%. Methyl iodide removal efficiencies for "A" and "B" were 8 995.9% and 96.7% respectively, and both systems were operable. This is the first such80

[oDs] occurrence with this s stem. "A" filter will be char ed with charcoal meetin acce t-8 Bance criteria per Technical Specifications before next startup. (Abnormal Occurrence

[os 50-244 75-08.

7 8 9 PAME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUER MANUFACTURER VGIATION gP8 9~BC E F 1 L T E R ~N A 2 2 0 Y 7 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

[oas] The s stem is isolated from air flow exce t for testin, so reduced molecular iodine 7 8 9 80

[pgg) removal efficiency may be due to aging of the charcoal. Tim filters are AAF-105P-842835, 7 8 9 80

~10 installed in 1969. A Technical Specification change will be considered to replace the 7 89 ont . un er t ona Factors 80 FACIUTY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION

~N ~oo o '~g NA b molecul'ar iodine removal testing 7 8 9 10 12 13 44 45 46 80 FORM OF 9'0 ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 2 Pi H NA NA 7 8 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[<is] ~00 0 E NA 7 8 9 11 12'3 80 PERSONNEL INJURIES NUMBER DESCRIPTION

~4 ~oo 0 NA 7 8 9 11 12 80 OFFSITE CONSEQUENCES NA 7 89 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~16 NA 7 89 10 80 PUBLICITY NA 7 89 80 ADDITIONAL FACTORS Q1g Cause Description (cont'd. ) surveillance acceptance criteria of 99. 9% molecular 7 89 80 Q>g iodine removal efficiency to 90.0% methyl iodide removal efficiency.

7 89 80 Charles E. Platt pgDNE, 7 16/546-2700, ext. 29 1-250 GPO 881 ~ 667

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