ML17252A275

Transmittal of Reportable Occurrence Report No. 50-249/1977-4

ML17252A275
Person / Time
Site:	Dresden
Issue date:	03/23/1977
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
50-249/1977-4
Download: ML17252A275 (3)

See also: IR 05000249/2019077

Text

8' Commonw.A.

Edison Dresden

Station R.R. #1 Morris, Illinois 60450 Telephone

815/942-2920

BBS Ltr. #77-239 March 23, 1977 Mr. James G. Keppler, Regional Director Directorate

of Regulatory

Operations

-Region I I I U. S. Nuclear Regulatory

Commission

799 Roosevelt

Road Glen Ellyn, Illinois 60137 (nclosed please find Reportable.

Occurrence

report number 50-249/1977-4.

This repo{t is being

to your office in

with the Dresden Nuclear Power Station Technical

Specifications, Section 6.6.B. BBS: j o Enclosure

cc: Director of Inspection

& Enforcement

Director of Management

Information

& Program Cohtrol Fi le/NRC MAR 2 5 1977

LICENSEE EVENT REPORT CONtROL BLOCK: l ,,, 1 e I I I I I.** LsE PRINT AU REQUIRED 1NFORMA.T10NJ

LICENSEE NAME . 6 LICENSE NUMBER UC EN SE TYPE ILlolRlsl3I

I o I o 1-1 o I o I o I o I ol -1 o I o I l 4 I I I 1 I 1 I 1 I 7 8 9 14 15 25 26 30 .

CATEGORY TYPE. SOURCE @mcoN'T I I . L!:J lJ:J 7 . 8 57. 58 '. _59 60 OOCKET NUMBER I o I s I o I _:_ I o 1-2 I 4 l 9 I 61 68 . EVENT OA TE . I o I 21 21 11 71 '71 69 74 EVENT DESCRIPTION

• * -* EVENT TYPE Io I 3 I 31 REPORT DATE 1013121317171

75 80* fol2l

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10151,J I ine would have provided the required isolation

had.an _anGal high-flow

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• rn RELEASED LzJ 7 8 9 PERSONNEL " POWER OTHER STATUS IQ I 4 I 3 I 10 12 13 CONTENT OF RELEASE AMOUNT OF ACTIVITY W . I 10 11 EXPOSURES

• NUMBER TYPE OESCRIPTION I ol ol ol L1J N 7 8 9 11 12 13 PERS'ONNEL

INJURIES NUMBER OESCRIPTION

COMPONENT

SUPPLIER COMPONENT

MANUFACTURER

w I BI 0 I 8 I 0 I 43 44 47 METHOD OF DISCOVERY

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ADDITIONAL

FACTORS NA 7 8 9 80 ..

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PHONE: __ E_x_t_._42

........ 1. --GPO 811t*eG7

CAUSE DESCRIPTION (Continued)

It is believed that the water originated

from a leaking area cooler (Which has since been repaired)

located above the

box. The switch was cleaned and reset to trip at the correct setpoint.

In addition, the cable

the junction box was sealed. tion of the hearby switches indicated

that water

was limited to this

switch. DPIS 3-261-26 is a Barton model 278 unit with a range of 0 -200 psig.