05000265/LER-1979-009, Forwards LER 79-009/03L-0.Corrects Docket Number of Original Forwarding Ltr

Forwards LER 79-009/03L-0.Corrects Docket Number of Original Forwarding Ltr

ML19270H011
Person / Time
Site:	Quad Cities
Issue date:	06/13/1979
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NJK-79-210, NUDOCS 7906220359
Download: ML19270H011 (1)

LER-1979-009, Forwards LER 79-009/03L-0.Corrects Docket Number of Original Forwarding Ltr

Event date:
Report date:
2651979009R00 - NRC Website

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Commonwealth Edison Quad Cities Nuclear Power Station 22710 206 Avenue Nonn Corcova, luinois 61242 Teisphone 309/6S&2241 NJ K-79-210 June 13, 1979 Mr. J. Keppler, Regional Director Office of Inspection and Enforcement Region lil V. S. Nuclear Regulatory Commission 795 Roosevelt Road Glen Ellyn, IL 60 B7 Reference: Quad-Cities Nuclear Power Station Docket No. 50-265, DPR-30, Unit 2 Appendix A, Sections 3.1 (Table 3 1-1) and 6.6.B.2.a This letter is to correct the docket number on the cover letter previously submitted with Reportable Occurrence Report No. RO 79-09/03!,, Docket No.

50-265, DPR-30, Unit 2 (May 11, 1979).

The Docket No. on the LER form is correct.

Please change the cover letter to read Docket No. 50-265. DPR-30, Unit 2, or attach this letter to the original cover letter.

Very t ruly yours,

COMMONWEALTH EDISON COMPANY

} -]' 4 g97 QUAD-CITIES NUCLEAR POWER STATION VCI

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- r N. J. Kalivi~anakis Station Superintendent NJ K/JCV/ san 1$19IC cc:

R. F. Janecek Y

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LICENSEE EVENT REPORT

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60 61 DOCKET NUM9ER 63 69 EV ENT CATE 74 h

REPORT O ATE 80 EVENT DESCRIPTION AND PRC8ASLE CONsECuENCES h a12 l While measuring the MSIV limit switch trio cositions durine a weekend outace. 10 of the!

12 switches measured on 6 MSIV's were found to be set greater thai. 10% of MSIV closure.]

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l These measurements were performed at the request of NRC Inspector G. Vricht.

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l 10% closure settings were originally set at the factory prior to installation and

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lo is l unit startup. Monthly MSIV closure scram functional testina has been cerformed to f

[ verify scram function operability.

The remaining 2 MSIV's will be checked at a

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futare outage of sufficient length.

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3J 34 35 36 31 4a 41 42 43 44 47 CAUsE DESCRIPTION AND CORRECTIVE ACTICNs l1 o j l The need for orior orecise field calibratien the exact lir,ir switch t-in -nint had f

ij q lnot been deemed necessary to be performed. A special procedure was develoced to enablef

exact measuring of the switch trip position in the field. As-found and corrected l

[swi tch posi tions are attached. The switches were. adjusted tof.102 closure and l

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functionally tested.

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INBOARD VALVES SCRAM CHANNEL "A" SCRAM CHANNEL "B" valve number as found corrected ' % error as found corrected

% error 2-203-1A 14.5%

9.6%

4.5%

14.4%

8.2%

4.4%

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2-203 IB 18.0%

9.4%

8.0%

16.0%

C.4%

6.0%

2-203-1C 11.3%

8.8%

1.3%

13.5%

8.5%

3.5%

2-203-1D 16.0%

9.8%

6.0%

12.7%

8.2%

2.7%

OUTBOARD VALVES SCRAM CHANNEL "A"

,5 CRAM CHANNEL "B"

/alve number as found corrected

% error as found corrected

% error 2-203-2C 20.8%

8.5%

10.8%

11.7%

6.9%

1.7%

2-203-2D 4.9%

8.9%

0.0%

6.0%

7.9%

0.0%

2348 029 p?.