ML17173A442

Forwards LER#78-063/03L-0

ML17173A442
Person / Time
Site:	Dresden
Issue date:	12/19/1978
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A443	List: ML17173A442 ML20027A562
References
NUDOCS 7812270261
Download: ML17173A442 (2)

Text

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Commonv9th Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 ' Telephone 815/942-2920 REGULATORY DOCl\ET FILE COPY December 19, 1978 BBS Ltr. #78-1582 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report /,178-063/03L-0, Docket f/050._237 is hereby submitted to your office in. accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation. Dresden BBS/deb Enclosure cc: Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC

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                                                                 .DOCKET NUMBER                 68 181 1 11 69 I 2 I 3 I 1 1s IG) I 1 I 2 I 1 l EVENT DATE                    74       75 9

REPORT DATE

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BO EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

                     !During normal surveillance testing of MSIV closure time; MSIV 2-203-lA closed in C2::IIJ          I 5.6 seconds and MSIV 2-203-lC closed in 2.8 seconds after the initiation signal, which I

[§]~]I did not meet T.S. Table 3. 7.D.2 limits of 3 </c T </=5 sec. Event was of minimal ITIIJ 1safety significance because other MSIV closure times were within T.S. limits and []JI] 1valves did close. This event has occurred several times before at Dresden, most [[DJ I recently referenced under R..O:. ti 50-249 I 78-54. (Iill 7 B 9 80 SYSTE~.'l CAUSE CAUSE COMP. VALVE CODE CODE SUB CODE COMPONENT CODE SUB CODE SUBCODE I c ID I@ ~@ ~@ I v I A I LI v I EI x I@ Ll:J@ w@ 9 10 11 12 13 18. 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION REPORT NO. CODE TYPE NO. 23 I oI 6 I 3 / 24 26 27 Io I 3 I 28 29

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30 31 w 32 ACTION FUTURE EFFECT SHUTDOWN * (,;:;\

• ATTACHMENT NPR0-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS '23J SUBMITTED FORM SUB. SUPPL! ER MANUFACTURER l!_l@l_U@

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 43 44 . 47 MSIV 2-203~1A and 2-203-lC valve timing was out of ~~d~j~u~s~t~m~e~.n~t~*~~A~f~t=e~r_m.:.:=inor adjust-ment to speed control ~alves, MSIV 2-203-lA closed pr6perly in 4.2 sec. Reyiew of historical closing times for MSIV's indicates that minimal time variations occur D:IIJ / infrequently because of wear and heat* of drywell environment. Valves will be in-r;-r:4l

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I~__:'---~~~~.:::'.-_.;:.:_:_~~~-=~~~~-:.:::.!:.-=c::::......-=-~---'~~~~~~~--~~--- spected during next refueling outage per DMP 233, __J 8 9 80 FACILITY h()\ METHOD OF ~ ST;\TUS  % POWER OTHER STATUS ~ DISCOVERY DISCOVERY DESCRIPTION '2_V.

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RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE @

   ~               L?J@) ~@._I-=NA:___ _ _ ___,                                                                                 NA 8     9              10         11                                            44                45                                                                                80 PERSONNEL EXPOSURES                           _ Q..

NUMBER TYPE DESCRIPTION GJIJ 1o 1o 1oJ@w@..___-____N = A - = - - - - - - - - - - , - - - - - - - - - - - - - - - - - - - - - 8 9 . 11 12 13 - 80 PERSONNEL INJURIES (,;"';\ .;.:.., .. NUMBER DESCRIPTION6

*. [CE]8 9I 0 I 0 I 0 11l@ ~12~~~~~~~~~~~:.!.-~~~~~~~~~~~~~~~~~~~~~~~~~~~---J80   NA LOSS OF OR DAMAGE TO FACILITY          t;j3'\

TYPE DESCRIPTION '<:.:;J CQ2J W@ . . NA 8 9 10 80 PUBLIC! TY (:;:\ ISSUED DESCRIPTION W

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