ML20044B044

LER 90-007-00:on 900611,discovered That Surveillance Procedure 2609E Re Encl Bldg Filtration Sys Testing - Refueling Not Performed Prior to Entering Mode 4.Caused by Personnel Error.Missed Surveillance performed.W/900710 Ltr

ML20044B044
Person / Time
Site:	Millstone
Issue date:	07/10/1990
From:	Northrop A, Scace S NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-90-007-02, LER-90-7-2, MP-90-678, NUDOCS 9007170240
Download: ML20044B044 (3)

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HARTFORD. CONNECTICUT. 06414-0270 =

Northeast Nuclear Energy company (203)665-6000 July 10, 1990 MP-90-678i  ;

Re: 10CFR50.73(a)(.7)(i)(B) j l

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. U.S. Nuclear Regulatory. Commission j Document Control Desk-

,' Washington, D.C. 20555

Reference:

' Facility Operating License No. DPR-65 Docket No. 50-336 Licensee Event Report 90-007-00 J

' Gentlemen:

This letter forwards Licensee Event Report 90-007-00 required to be submitted within :

thirty (30) days pursuant to 10CFR50.73(a)(2)(i)(B),

d Wry truly yours, NORT14 EAST NUCLEAR ENERGY COMPANY For: Stephen E. Scace Director, Millstone Station

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1 By: ohn P, tetz Unit 1 Director

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Attachment:

LER 90-007-00

. cc: : T. T. Martin, Region I Administrator W; J. Raymond, Senior Resident inspector, Millstone Unit Nos.1, 2 and 3 L' ,

G. S; Vissing, NRC Project Manager, Millstone Unit No. 2

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Estimated buroen por rssoonse to comply with tNs F e antormaison conection reavest. 60 0 nrs. Forwaro ,

t buroen estimate to the Records J LICENSEE EVENT REPORT (LER) '

comments ano R.porisreparame.meni uanao eranen <p-630i. u.s. Nucies, Regulatory Commission. WasNngton DC 20656 and to the Paperwork ReGuction Protect (3160-0104). Offica of j Management and buopet. WasNngton, DC 20603 '

F AC41TY NAME (1) DOCKEl NJMbER WI P* V 4 Millstone Nuclear Power Station Unit 2 ol 5l ol ol ol313 l6 1lod0l2 liitE 14)-

Missed Surveillance EVENT DATE 16) LF A NUMDE A 45) AFDOAT DATE 176 OTHEA F ACILfTIEF NvotVED f 8i MONTF DAY YEAR YEAA MON 1H DAY YEAR F ACILIT Y N AMk6 olslolofof I1

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0 6 1l1 9 0 9 l0 0l0l7 0l 0 0l ? 1l 0 9l 0 oi si ot ol oj l l OPERATNG THIS REPORT LS BENG SUBMITTED PUR$UANT TO THE REOULAEMENTS OF 10 CFR l ICheck one or mo e of the following)f11) 20 4021b) 20 402(c) 60.73taH2)(sy; 73.71lb) po n 20 406talOHO 60.36 tc)O) 60.73taH2)lv) 73.71(c)

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UCENSEE CONT ACT FOR TH1$ LER f121 NAMg TELEPHONE NUMBE A ARE A COOf Andrew K, Northrop, Engineer, Ext. 6066 2 0l3 4]4l7[-l1l7l9]1  !

COMPLFTE ONE UNE FOA E ACH COMPONENT F AILUAE DESCA' BED N THiS AEDOAT 1131 cAust system CouPoNEN* Mh"ykk ' fD Sygh CAUSE SYSTEM COMPONENT Nkh* .

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7 YEs ni ves, comoisie EXPECTED SUBMISSION DATEl NO 1l0 3l1 9l0 ABSTRACT (umit to 1400 spaces, 6 e., apprommaise y fifteen omgie-space typewritten lines) 06)

On June 11,1990, at 0930, with the plant in Mode 4 at 238'F and 0% power, it was discovered that Surveillance Procedure 2609E, Enclosure Building Filtration System (EBFS) Testing - Refueling, had not been performed prior to entering Mode 4. This is in violation of the Unit Technical Specification Surveillance ,

Requirement 4.6.5.1(d). The surveillance _ procedure, which tests the operability of the EBFS by remotely

• starting each train-and verifying that each can draw a negative pressure in the Enclosure Building, was performed successfully immediately after making this discovery.

Similar Events: None l;

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'm'366A - U.S NUCLEcR REGULATORY CoMN3SStoN -APPRovg g3]60-0104 Estem.t.o turo.n per t.sponse to comply witn tnis LICENSEE EVENT REPORT (LER) g,m,,*$g,g,',cigg,*gan's,5,0nf,l',5, ,,*o',**;*

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Man.oement ena Bursg.t. Wasnington. oc 20!C3 FActuTY NAME o) DocKE1 NUMBER (2) typ m vppm o PAGE (36 YEAR M N Millstone Nuclear Power Station ~ ~

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1. Decerintion of Event -

.On June 11,1990. at 0930, with the plant in Mode 4 at 238'F and 0% power, it was discovered that Surveillance Procedure 2609E, Enclosure Building Filtration System (EBFS) Testing - Refuehng, had not -

been performed prior to entering Mode 4. The surveillance procedure, which tests the operability of the EBFS by remotely starting each train and verifying that each can draw a negative pressure in the Enclosure Building, was successfully performed immediately after making this discovery,

, 11. Cause of Event

'The cause of this event was personnel error in that the plant Technical Specification Suneillance Requirements werE not correctly applied. The Technical Spccification to which the operating staff referred, Surveillance 4.6.5.l(a), discusses performing a surveillance similar to SP 2609E every 18 months or after a specific set of structural maintenance to the Enclosure Building Filtration System. The maintenance performed in this case was not included in that set, and the test had been run at the end of the previous refueling outage (less than 18 months prior). so the operating staff concluded that the surveillance was not rege' red. The work actually done on the Enclosure Building had invalidated the previous test (SP 2609E, required by Section 4.6.5.1(d)), and the unit therefore did not meet this -

Technical Specification Sun'elliance Requirement.

Ill. Annhsis of Event At no time during this event was the plant in an unsafe condition or was there any risk to the public.

The surveillance procedure was performed satisfactorily immediately after the error was discovered. The

, plant was in Mode 4 for less than 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> before the error was found and corrective action was taken.

IV.. Corrective Action The immediate corrective action was to perform the missed surveillance. Long term corrective action consisted of discussing this event with the individuals involved, in addition, the event will be discussed at the next Operations Department meeting in order to prevent recurrence. Because this was an isolated incident, no further action is required.

V, Additional Information Similar Events: None

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