ML20084L228

Ao:On 740415,main Steam Line High Temp Isolation Temp Switches Found W/Setpoints Exceeding Tech Spec Limit of 200 F or Less.Caused by Normal Instrument Drift.Switches Recalibr at 185 F

ML20084L228
Person / Time
Site:	Quad Cities
Issue date:	04/25/1974
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	Oleary J US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084L230	List: ML20084L228 ML20084L232 ML20084L233
References
NJK-74-48, NUDOCS 8305200399
Download: ML20084L228 (2)

Text

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C;mmt :lth Edison (,'

i fC Ouad-Cm ienerahng Stat;on Post Off:ce Box 216

( (' N 8 /- Cordova,1:hnois 61242

~2~ Telephone 309/654-2241 o, 9

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NJK-74-48 -@

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Mr. John F. O ' Leary, Di rector 4 < t y, ..

Directorate of Licensing 1TF;P Regulation U.S. Atomic Energy Commission Washington, D.C. 20545

Reference:

Quad-Citics Nuclear Power Station Unit 1, Docket No. 50-254, DPR-29, Appendix A; . Sections 1.A.2, 3.2.A, Table 3 2.1, and Section 6.6.B.l.a.

Dear Mr. O' Leary,

The purpose of this ietter is to inform you of the details concerning main steam line high temperature isolation temocrature switches which were found with setpoints exceeding Technical Specification 3.2.A. This abnormal oc-currenc e was previously reported to you by telegrem and to Region li t ,

Directorate of Regulatory Operations by telephone and telegrta on April 15, I c.% .

PROBLEM AND INVESTIGATION On April 15, 1974, with unit one in the cold shutdcun condition for the re-fueling outage, routine surveillance calibration was performed on the sixteen main steam line high temperature isolation temperature switches., Fourteen of the sixteen switches were found with setpoints in excess of 6 2000 F as specified in Table 3.2.1 of the Technical Specifications. The "as found" setpoints for these switches are:

EQUIPMENT PIECES NUMBER S_ETP0 l NT, F TS-1-261-15 A 216 B 212 C 211 D 213 TS-1-261-16 A 204 B 211 0 206 TS-1-261-17 A 215 0 213 D 212 -

TS-1-261-18 A 214 S b* .b.f B 208 p' q ) J C 216 -

'V y\; 4 D 212 t 399 740425

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