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)

Text

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{TEMPORARY FORivl)OONTROL No: F}LF~IHCI1)i'.1P'EPORT FILE FROM: Rochester&Electric Co.Roches ter,.N.Y.James P.O'Reilly DATE OF DOC 4-17-75 O.R I G 1 Signed DATE R EC'D 5~1 75 CC OTHER LTH XX BPT, OTHER SFNT AEC PDR SFNT LOCAL PDR C~~SS UiVC LASS XXXX PROP INFO INPUT NO CYS REC'D 1 DOCKET NO: 50-244 DESCRIPTION:

Ltr.trans the following....

ENCLOSURES:

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.VICE PRKSIDKNT TK(.KPNONK ARKA COOK 7ld 546-2700~Apri:1 1-7-, 1975 0 Mr.James P.O'Reilly, Director+4'.S.Nuclear Regulatory Commis'on Office of Inspection and Enforcem Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 b, eJJJJJe"."@Q P$+If';W

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 CONTROL BLOCK:~LICENSEE EVENT REPOR~(PLEASE PRINT ALL REQIJIRED INFORMATION)

LICENSEE NAME Ioag N Y R E G 1 0 0 7 89 14 15 LICENSE NUMBER 0 0 0 0 0-0 0 LICENSE TYPE EVENT TYPE 4 1 1 1 1~01 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE[001]cONT~MI T L 0 7 8 57 58 59 60 61 EVENT DESCRIPTION

[oO~)During refueling shutdown DOCKET NUMBER.EVENT DATE REPORT DATE 5 0-0 2 4 4 0 4 0 8 7 5 0 4 1 7 7 5 68 69 74 75 80 the post accident filters charcoal samples showed"A" filter 7 8 9[QD3]charcoal molecular iodine removal efficienc of 99.4%, while for"B", above the 80 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 75-08.80 7 8 9 PAME SYSTEM CAUSE COMPONENT CODE CODE COMPONENT CODE SUPPUER VGIATION gP~BC E F 1 L T E R~N Y 7 8 9 10 11 12 17 43 44 47 CAUSE DESCRIPTION

[oas]The s stem is isolated from air flow exce t for testin, so reduced molecular iodine COMPONENT MANUFACTURER A 2 2 0 48 7 8 9 80[pgg)removal efficiency may be due to aging of the charcoal.Tim filters are AAF-105P-842835, 80 ont.un er t ona Factors DISCOVERY DESCRIPTION molecul'ar iodine removal testing 7 89 FACIUTY STATUS%POWER'~g~N~oo o 7 8 9 10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF 2 Pi H NA 7 8 9'0 11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

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

~4~oo 0 NA 7 8 9 11 12 OFFSITE CONSEQUENCES METHOD OF DISCOVERY OTHER STATUS NA b 80 46 44 45 LOCATION OF RELEASE ACTIVITY NA 44 45 80 NA 80 80 NA 7 8 9 80~10 installed in 1969.A Technical Specification change will be considered to replace the 7 89 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~16 7 89 10 PUBLICITY 7 89 NA NA 80 80 80 ADDITIONAL FACTORS Q1g Cause Description (cont'd.)surveillance acceptance criteria of 99.9%molecular 7 89 Q>g iodine removal efficiency to 90.0%methyl iodide removal efficiency.

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

~il Lf.p 4'~1gpg