05000237/LER-1979-041, Forwards LER 79-041/03L-0

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Forwards LER 79-041/03L-0
ML17173A925
Person / Time
Site: Dresden Constellation icon.png
Issue date: 06/15/1979
From: Stephenson B
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A926 List:
References
79-488, NUDOCS 7906220282
Download: ML17173A925 (2)
v • d • e


LER-1979-041, Forwards LER 79-041/03L-0
Event date:
Report date:
2371979041R00 - NRC Website
v • d • e

text

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-"*,-*- WI Commonweal9dison Dresden ~uclear Power Station Jt.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 BBS Ltr *. 1179-488 June 15, 1979 James G. Keppler, R~gional Director Directorate of :~-~g_aj.i:!~-~~y: *Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137.

Reportable Occurrence Report /179-041-03L-0, Docket II 050-237 is hereby submitted to your office ~n accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.2.(b), conditions leading to operation in a degraded mode permi-tted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

  • .Q;t;Lcm~

~-B. B. Stephenson 1. Superintendent Dresden Nuclear Power Station BBS/Kroh.

Enclosure.

CC:

Director of Inspection & Enforcement Director of Management Information & Program Contr.ol File/NRC RETURN TO REACTOR DOCKET Fl~ '1 D ~ Li D f~f2_.,.-

. *,*~ 1 9 1979

~

J*.i111.J ru. ~1~*1..JUU rr-n1 alC~i\\!SEE EVEl\\lT REPORT

~-..

F'

--~

  • 1,., I {;'\\

w

... * ***cb'"Nnw!... st.ocK: Ll~ _ _ _

0.

. (PLEAsE PRINT oR TYPE,ALL Rrnu1REo.1N:=oRMAT10N1 1

6 rn I I IL ID IR Is iUQI ol 0 I-I ol ol ol ol 0 I - I 0 I 0101 4 I 1 I 1I1 I 110LL-10 7

8 9

LICENSEE CODE 14 15 LICENSE NUMUER 25

>6 LICENSE TYPE
JO 57 CAl 58 CON'T

"[ill]

~~~~~ LIJ© I o I s I o I o I o I 2 h* 17 101 a I 6 I a I 6 I 1 I 9 101 a I 6 I 1 I s I 1 I 9~-+@---

74

  • 15 REPOR.T DA TE 80 7

8 60 61 DOCKET l~UMBE.Fl 68 69 EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

~l_D_u~r_i_n~g"--n_o_rm a_l_u_n_i_t_o_p..__e_r_a_t_i_o_n_t_h_e __

2B __

r_e_c_i_r_c_M_G __

s_e_t_._f_i_e_l_d_c_i_*rcuit breaker tripped open.

~]

In accordance with Tech Spec.. 3.-6.H4 *the *speed *of the -remaining. r-ecirc pump was l))IJ I immediately reduced to less than 65%.

This event has minimal safety significance I

I

((ill.__s_i_n_c_e_t_h_e __

2_A_r_e_c_i_r_c_p_u_m_p_r_e_m_a_i_n_e_d_o_p_e_r_a_t_i_n_g_. _N_o_p_r_e_v_i_o_u_s_o_c_c_u_r_r_e_n_c_e_s_o_f_t_h_i_s_n_a_t_u_r_e __ _,I [TI[) Lhave been reported.

"[ill].-.___----------~-------'---------------,----,-------'

[9))]_.__ ____________...,...--~------------------,------~

7 6 9 80 SYSTEM CODE l c I BI@

9 10 c:::-._

LE R/RO CV ENT YE.A.A

~ REPORT I 7 j 9 I NUMBER
  • 21 22

CAUSE

CAUSE CODE SUBCODE COMPONENT CODE W@ LU@ I T ! N I s I T I R I u 1@

11 12 13 18 SEQUENTIAL OCCURRENCE REPORT rw_

CODE

'-=J J o I 411 I J /I Io I 3 I 23 24 26 27 28 29 COMP.

VALVE SUB CODE SUB CODE

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.. J@

19 20.* *,

REPORT TYPE L!J 30 31 REVISIO~J NO.

lQ.J 32 ACTION FUTURE TAKEN ACTION EFFECT

. ON PLANT SHUTDOWN METHOD r:;::;...

ATTACHMENT HOURS ~ SUBMITTED NPRD*4 FORM :SUB.

PRIME C.OMP.

SUPF'IJER COf>.~PCrJENT MANUFACTURER W@W@.LJJ@.LLJ@.lo I ol 11 sl L~J@

33 34 35 36 3.7 40 41 w lEJ@

IH 11 ! s I 71@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

42

. 43 44 47

~- I Cause was the field circuit breaker tripping open due to failure of potential ITDJ I transformer in vol:tage regu-lator circuit.

Faulty transformer was replaced. and the IJJ]1.l pump restarted satisfactorily~

No.. additional corrective -action necessary due to

  • I CII1J singular occurrence.

7 s

9 FACILITY STATUS f:30\\. METHOD OF A

80 [ill] Ll_l@

% POWER

.OTHER STATUS ~.OISCOVE;RY DISCOVERY DESCRIPTION ~

J 0 I 9 I 6 l@._l _N_._/_A _____ ___.I

  • LA_J@)._I _Op._e_r_a_t_o_r_O_b_s_e_r_v_a t_i_* o_n _______ ~

8 9

ACTIVITY 10 12 11 44 45 46

~nm

~

Q BC RELEASED OF RELEASE AMOUNT OF ACTl\\llTY ~

LOCATION OF RELEASE

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N...;.../ A ________ ____,J J.__N_/ A ____________ __..I 7

8 9

10 11 44 45 80 PERSONNEL EXPOSURES r::>.

NUMUER A

TYPE DESCnlPTION

~

Lil o I oJLi.J@LNI"'-"-----------'------------------"

8 9

11 12

. 13 PERSONNEL INJUFliES Q

NUMUEn DESCRIPTION6 q /

<"\\ 0. }

80 [iliJ -I 0 I 0 I 0 l@I

. Nf A '] 0 lP h ;). 0 a'-- I 7

8 9

11

~12---..----'-"'-"---'---=~--"_._---------------~----------~--'BO LOSS OF on DAMAGE TO FACILITY 143' TYPE DESCf11PTIOr~

~

~@[

N/A 9

10 80 PUBLICITY Q

ISSUEOt::;:;\\ DESCfllPTION ~

NRC LISE ONLY LYJ6l N/ A Ul_Ll_J I I I I I I I ~-

n

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~~68 69

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  • NAM r or PnF. r 1, RE 1~ ___

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