ML19210A189

Abnormal Occurrence 50-289/75-38:on 751021,control Rod Verification Program Not in Compliance W/Tech Specs.Caused by Procedure Misinterpretation.Revised Surveillance Program Will Clearly State Requirement of Individual Rod Movement

ML19210A189
Person / Time
Site:	Three Mile Island
Issue date:	10/31/1975
From:	Arnold R METROPOLITAN EDISON CO.
To:
References
GQL-1662, NUDOCS 7910240910
Download: ML19210A189 (4)

Text

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RIBUTION FOR PART 50 DOCK ATERIAL NRf -

(TEMPORARY FORM)

CONTROL NO: I 7 le 37-

• l LE: I?! CIDE!?T REPORT FI --

FROM: netropolitan Edison Co DATE OF DOC DATE REC'D LT WX RPT OTHER g Pa t0-31-75 11-3-75 XXX gc n

TO:

ORIG CC OTHER SENT AEC PDR XX lit one signed SENT LOCAL PDR CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:

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30-289 DESCRIPTION:

ENCLOSURES:

Ltr regorting abnormal Occurrence #72-38 on lu-21-72 concerning inadequacy in the laplemen-c 64 tion of a Gentrol, Rod Program Vertiication...

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SCHWENCER (L) ZIEMANN (L)

REGAN (E)'7&d (3)

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DICKER (E)

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W/ Cooies W/ Copies W/ Cocies W/ Copies PAR R (L)

VASSALLO (L)

KNIGHTON (E)

SPELS W/ Copies W/ Copies W/ Copics W/ Copics KNIEL (L)

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TECH REVIEW DENTON llc ASST A/T IND.

NRC POR pSCHROEDER 9 RIMES R. DIGGS (L)

BRAITMAN

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1. MACCARY GAMMILL H. GE ARIN (L)

SALTZMAN GOSSICK/ST AF F KNIGHT KASTNER E. GOU LBOURNE (L)

MELTZ CASE PAWLICKi BALLARD P. KREUTZER (E) f GIAMBUSSO SHAO SPANG LE R J. LEE (L)

PLANS BOYD

• • p ST E L LO M. RUSHM00:t (L)

MCDONALD MOORE (L)

• • HOUSTON ENVIRO S. REED (E)

CHAPMAN

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,.NOVAK MULLER M. SERVICE (L)

DUBE (Ltr)

SKOVHOLT (L)

ROSS DICKER S. SHEPPARD (L)

E. COUPE GOLLER (L) (Ltr) lPPOLITO KNIGHTON M. SLATER (E)

PETERSON f

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/TEDESCO YOUNGBLOOD H. SMITH (L)

HARTFIELD (2)

DENISE J. CCLLINS REGAN S. TEETS (L)

KLECKER REG OPR LAIN AS PROJECT LDR G. WILLI AMS (E)

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BENAROYA V. WILSON (L)

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Cetc ?cer 31, 1975 GQL 1662

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.\\A,i' re-Director of IIuclear Reacter Regulation

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U.S. :!uclear Regulatory Cc==ission Washingten, D.C.

20555

Dear Sir:

Dcchet :To. 50-289 Operating License Uc. CFR-50 In acccrdance with the Technical Specifications of cur Three Mile Island Nuclear Statica Unit 1 (T'4I-1), we are repcrting the folleving abncr al cccurrence.

(1)

Repcrt Number: A0 50-289/75-36 Y g'n~/s

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(2a) Report Date: October 31, 1975 pocxy g

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(2b) Occurrence Date: October 21, 1975 b

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Facility: Three Mile Island Nuclear Station Unit 1 unh @' '* '

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Identification of Cccurrence:

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Title:

Inadequacy in the imple=entation cf a Centrol Red N

Fregra: Verificatien.

Type:

An abncr:al cccurrence as defined by the Technical Specifications, paragraph 1.8g, in that the surveillance requirements Of Technical Specificaticn h.7.2.1 vere not satisfied during a Centrol Rcd Progra 7erificatien.

(5)

Conditions Frier to Occurrence:

Fever: Cere:

89%

Ilec.: 773 :Ge EC Flcv: 138 x 10 lbs./nr.

EC Pressure: 2155 psig hh\\

RC Temp..

579 F FR".2 *.evel.

237" nc-rR c.,e:p.

opu :

MM2

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(6)

Description of Cccurrence:

Cn Cctcber 21, 1975, during a Plant Cperation Eeview Cc==ittee review of the results of the Ccntrol Ecd Progrs= 7erification, it was fcund that the surveillance requirements cf Technical Specification L.T.2.1 were not catisfied. The surveillance was performed by =cving a group cf rods the required distance and verifying that the cceputer input for each red respended. The procedure requires that each rcd in the group shculd be =cved separately.

The Plant Cperation Review Ccnmittee concluded that the surveillance, as performed, verified _that the rods were in the correct grcup.

In addition, a visual inspection of each patch plug was perferred and assured that aneh red was trcterly connected within the groun..

(7)

Eesignation of Apparent Cause of Cccurrence:

The cause of this cccurrence has been determined to be personnel /

precedure in that the personnel invcived =isinterpreted the Centrol Red Progrs= lerification prccedure. Procedure inadequacy centributed to the cccurrence since the surveillance precedures do not conclusively state that each red must be =cved individually to assure a satisfactcry test.

(B)

Analysis of Cecurrence:

It has been determined that this cccurrence did not constitute a threat to the health and safety of the public in that; a.

The incorrect precedure used in the surveillance dida not result in any improper connecticn cf centrol rods and did not affect the ner=al cperation of the equipment involved and b..

if an incorrect red assignment within a grcup would have occurred, flux distribution during ncr=al operation vculd have not been affected since all rods within a group are =cved together.

(9)

Ccrrective Acticn:

In addition to i=nediate action described abcve, lcng ter= corrective acticns are as follows:

a.

The Surveillance Procedure vill be revised to clearly state that individual rod =cve=ent is a require =ent for the performance of the Centrol Ecd Frcgr1=

Verification.

b.

Cperations perscnnel vill be cautioned that strict cct-pliance with surveillance procedures is required.

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(10) 7ailure Cata: Not Applicable Similar Cccurrences: Ncne Sincerely, n

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. ' Ih R. C. Arnold Vice Dresident

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