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)

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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____ __JI 7 . 8 9 80 lol3I

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__ w_a_s __ f_o_u_n_d

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____ __JI 7 *8 9 80 10151,J I ine would have provided the required isolation had.an _anGal high-flow con-:-l 7* .8 (Q]§J .. ___ . _d_i_t_io_n

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___ T_h_i_s __ i._s __

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11 7 8 9 PRIME . 80 SYSTEM CODE' @£] 1*c1 ol FACILITY STATUS fill] Ll.J 7 .8 9 FORM OF' ACTIVITY*

• 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 I I 44 45 46 NA \/10LATl)N I tY1 I 48

• LOCATION OF RELEASE 80 I, ... 44".,,: 45

..... -* _ _,_... ___________

___,I .. w. 80 80 ITEJ lol ol ol* 7 8 9* 11 12 BO OFFSITE. CONSEQUENCES . EE NA 7 8 9 ao LOSS OR DAMAGE .. TO FACILITY . TYPE OESCRIPTION . (Ifilll.J

.,__ ___ N_A _________________________________

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...__....__

__ 7 8 9 10 80 PUBLICITY . EfZl *-NA 7 B 9"-------.:.:.:..:--.-...;.

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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.