ML17252A290
| ML17252A290 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/21/1977 |
| From: | Stephenson B Commonwealth Edison Co |
| To: | James Keppler NRC/RGN-III |
| References | |
| 50-249/1977-10 | |
| Download: ML17252A290 (2) | |
Text
Commonw~ Edison Dresden Nucle~:er Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 BBS Ltr4 # 77-342 April 21, 1977 Mr. James G. Keppleri Regional Director Directorate of Regulatory Operation - Region I I I U.
~. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Enclti~ed please find Reportabl~ Occurrence report nµmber 50-249/1977-10.
This report is being submitted to ypur office in accord9rce with the Dresden Nuclear Power' Station Techni.cal Specificat.ions, Section,..,6.6.B.
-~
BBS/skm Enc4osure cc:
Director of Inspection & Enforcement tep nson Station S perintendent Dresden Nuclear Power Station Director of ManagemeDt
!~formation & Program Control Fi le/NRC J
7 7 ( "2-7 0 c) J -,
P.PR 2 6 1977
LICENSEE EVENT REPORT
. co~TAOL BLOCK: ~J
, *I.* I I I
&se PRINT ALL REali1REo\\io.iFoRMAT10NJ
- ~
LICENSEE NAME
@E] 111 ti 01 RI 5'3 I
=C.~_-.1 - 8. 9 14 CATEGORY 1
6 LICENSE NUMBER I 01° I~ I o* 1 o I o I o I o 1-1 o I 91 15
.25 REPORT SOURCE 26 LICENSE TYPE I I I I I I I 30 EVENT TYPE I 0 I 11 31 32
- @ElcoN~ I I I 7 '8 57.. 58 REPORT TYPE.
L2J ~
~EPORT CATE 1°1 121 2 17171 59 60 75 80' EVENT DESCRIPTION..
lol21 I Dl!ring routine calibration checks, undervoltage relays for buses 34-1 and 38 were 7
8 9 lo131 I found to.be appare~tly inoperative.
Relay227-I on bus 34-l appeared to operate 8l 7. 8 9 80 (ol411~*--_s_1_u_g_g_i_s_h_l_y_; __
r_e_1a_y~-22_7_-__
1_o_n_._b_u~s--3_8 __
a_p_p_e_a_re_d __ t_o __ h_a_v_e __ b_e_e_n __
a_s_s_e_m_b_l_ed_. __
im_p_r_o~p-e_r_l_Y_* ___ **_T_h_e_--1I
. ~**
9 V~i(~)On bus 34-l w.as disasse~bJed, cleaned, satisfactorily tested and returned to SO illeJ.* ~-------------------------__.;..~...;..___;. __ -_,,_ ___ _JI.
7 8 9 80 (filID-1 service.
The relay for bus 38 was reassembled correctly; tested, and returned I
- 1. 8 9 PRIME (continued) so SYSTEM.. CAUSE COMPONENT COMPONENT*
COOE
. CODE COMPONENT CODE SUPPLIER..
MANUFACTURER
@El I 9 B I L!J
[-RI E IL JA IV Ix l
~
I G Io 1 a I o.1 V10LATllN
~
7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION lol81 (
- NA - The~~of the event cannot be definitively established at I
this time.
The 7
8 9
~
- 80.
(oj9j l~. ___ r_e_s_u_l_t_s __ o_f __ t_h_e __ i_n_v_e_s_t_ig_a_t_io_n __ p_r_e_s~e_n_t_l_Y_._u_n_d_e_rw_a_y ___ w i1_1 ___ b_e __
s_u_b_m_i_t_t_e~d-i_n~a
......... f~.*6-~l_:1_o_w_-_u_p __...;;;..._.~I 7
8 9 80
. ffi§1 report.
7 8 9 80 FACILITY METHOD OF STATIJS
% POWER OTHER STATUS DISC~VERY
[ill]
L:J I 0 I 0 I 0 I NA I~ I NA DISCOVERY DESCRIPTION 7.. 8*
9 10 12 13 44 45:
46 SQ FORM OF CONTENT ACTIVITY fill]
RELEASED OF r~LrSE I AMOUNT OF.ACTIVITY I
w NA NA LOCATION OF RELEASE 7
8 9
10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION
~
10 I.01 01
~~* ~-N~A----~------~-__;_--~---~
7 8 9 11 12 13 60 PERS'ONNEL INJURIES.
NU~.lBER
.DESCRIPTION EEJ I 0,. 0 I 0 I
~-N A ________________
~.....-...;;;~...;..___;___;._ _
~
7 8 9 11 12 80 OFFSITE *CONSEQUENCES NA*
Em~--~----...-:-----_....---_____________..;___ ___ __,
1.a 9 80 LOSS OR DAMAGE TO FACILITY TYPE Efil w 7
8 9 OESCAIPTIQN NA 10 PUBLICITY (iEJ NA 7
8 9 ADDITIONAL FACTORS
~ I EVENT DESCR I PT t*ON *;~~continued). to 1 a 9 80 80 service.
The safety implications of 80 This is not a repetitive occurrence.
£:0 Eifil '..this event cannot be established at this time.
7 8.9 (50-249/1977,.,10)
NAME:-.... _____
G_. _L_. _R_o_m_b_a _____________ PH.ONE: __
E...,..x_t_, _4_2_1 __ _
GPO eat* U'l'