ML17252B541

LER 81-030/01T-0 for Dresden, Unit 2 Re Operator Noticed the HPCI Steam Line Was Cold and Filled with Water. the HPCI System Was Declared Inoperable

ML17252B541
Person / Time
Site:	Dresden
Issue date:	06/08/1981
From:	Scott D Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
DJS LTR 81-471 LER 81-030/01T-0
Download: ML17252B541 (4)

Text

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. Dresd.en Nuclear Power Station R.R. #1 .

Morris, Illinois 60450 Telephone 815/942-2920 June 8, 1981 DJS LTR /181-471 James G. Keppler, Regional Director Directorate of Regulatory Operations Region III

• U.S. Nuclear Regulatory Commission 799 Roosevelt Roa9 Glen Ellyn, IL 60137 Reportable Occurrence Repo_rt 1181~30/0lT-0, Docket 11050-237 is being submitted to your office in*accordance with Dresd~n *Nuclear Power Sta ti.on Technical Specification 6. 6.B. l. (b), operation of the unit or affected systems when any parameter or operation subject to a limiiing condition is less conservative than the least conservative aspect of the limiting condition for operation established in the technical specifications.

.Dj:Ju11 D. J. Scott Station Superintendent Dresden Nuclear Power Station DJS:lg Enclosure cc: Director of Inspection & Enforcement Director of Management Information & *Program Control U.S. NRC, Document Mgt. Branch File/NRC

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NRC-FORM 366 17.-77) --- -- ----:-----------.CENSEE EV~NT ~-~~Q~~-------lLS.iCLEAR REGULATORY COMMISSION ______

0 CONTROL BLOCK: I* *1' I 10 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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7 8 9 L.ICENSEE' CODE 14 15 L.ICENSE NUMBER 25 2s* L.ICENSE TYPE JO 57 CAT 58 CON'T filI1 ~~~~~~ ~©I o I s Io J oI oI 2I 3 I 1 101 o I s I 2 I 6 I a ~1 I© Io I6 I oI a I a I 1 I© 7 8 60 * , 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTIO~ ANO PROBABLE CONSEQUENCES@ . . ,

I During normal operation an operator noticed the HPCI steam line was cold and filled

!))I] I with water. :The HPCI system was declared inoperable (Tech. Spec. 3~5.C.l). The health C§:J'.r] I and safety of the general public was not endangered since redundant safety systems were

[))))I operable. This is the first occurrence,of this type.

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. SEQUENTIAL. OCCURRENCE REPORT REVISION t::;.. L.ER/RO LVENT YEAR REPORT NO. CODE TYPE NO.

~ REPORT I 8 I1I I I I 0 I3 I0 I I /I I0I1 I L!J 1=J L£J NUMBER 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ~ ATTACHMENT NPR04 PRIME COMP. COMPONENT TAKEN ACTION ON PL.ANT METHOD HOURS 22 SUBMITTED FORM:>UB. SUPPL.I ER MANUFACTURER

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33 34 . 35 36 37 40 41 42 43 44 4.,-----*

CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

!The cause of the pipe filling with water w~s-that the valve disc was installed backwardsj OJJJ ion the HPCI turbine steam supply valve, thereby not allowing condensate to drain from

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o:m 1the pipe. The valve was rebuilt ensuring that the valve disc was installed properly.

IJlI] I The work m~nual or maintenance procedure for this valve will be changed to verify proper!

[II!] I installation of disc.

7 8 9 80 FACIL.ITY STATUS  % POWER OTHER STATUS ljQ\

\.:::;:J METHOD OF DISCOVERY DISCOVERY DESCRIPTION

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7 8 W

9 I 0 I 4 I 4 l@I.....-~N~/A~_____.I LLJ@I 10 12 11 44 45 0Eerator observation 46 80 ACTIVITY CONTENT ~

REL.EASED OF REL.EASE AMOUNT OF ACTIVITY L.OCATION OF REL.EASE @

DEW@ Ll.J@I.___'_ ____.N...../=A_ _ _ __ N/A I 7 8- 9 10 11 44 46 80 PERSONNEL. EXPOSURES ~

NUMBER t:;:;\ TYPE~ DESCRIPTION CiIIJ I 01010 7 8 9 11 l~~~L..----*____N~/_A~----------------------------------~-----1 12 13 80 PERSONNEL. INJURIES ~

NUMBER DESCRIPTION~

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_______.___N_/_A____.....------------------------------------_. 80 L.OSS OF OR DAMAGE TO FAC_I L.ITY TYPE DESCRIPTION 1.i3'

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PUBLICITY ISSUED/,;°;\ DESCRIPTION~

NRC USE ONLY .

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/ATTACHMENT TO LICENSEE EVENT REPORT#Sl-030-0lT/O

' COMMONWEALTH EDISON COMPANY (CWE)

DRESDEN UNIT 112 DOCKET ti 050-237 During normal operation, while performing a plant tour, an operator noticed HPCI steam supply iine to be cold and filled with water. *The HPCI system was declared inoperable. The wat.er was immediately drained from the pipe via an alternate path to make the HPCI system operable. The health and safety of the general public was not endangered since redundant systems were operable. This is .the first occurre~ce of this type.

• Investigation revealed that the disc of the HPCI turbine steam supply valve was installed backwards, thereby not allowing the condensate to drain from the system. The valve was rebuilt ensuring that the valve disc was installed properly. The work manual or maintenance procedure for this valve will be changed to verify proper installation of disc.

.. - e I Commonwealth Edison

• DEVIATION REPORT oVR NO.

STA D UNIT :VEAR 2 - 81-NO.

so PART1ITITLE OF DEVIATION OCCURRED -

SL26L8l 2020 Possible Filling of HPCI Steam Line .DATE TIME SYSTEM AFFECTED 2300 PLANT CONDITIONS TESTING HPCI Run 1136 CJ GU MODE PWR(MWT) LOAD (MWE) 315 YES NO

\ DESCRIPTION OF EVENT Determined that HPCI Steam Line was filled with condensate from Rx vessel to the MO 2-2301-3 valve.

DESCRIPTION OF GAUSE Unknown OTfiER APPLICABLE INFORMATION M0-2-2301-3 valve was manually cracked open to establish flow and drain the line. Valve 2301-3 breaker was racked OOS to prevent auto openine.

EQUIPMENT DYES DR NO. WR NO. John Achterberg 5/26/81 FAILURE GJ NO 13762 RESPONSIBLE SUPl:RVISOR DATE PART 2 OPERATING ENGINEERS COMMENTS

_Hf line was found full of water.

required surveillance and returned HPCI to service at 0230 on 5/29/81.

SAFETY~\

TYPE OF DEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED '

REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTING WR ISSUED.\ .

YES [U '.

0 14 DAY D 10CFR21 YES [i]

D 30 DAY ~.TGl .IJ31 .Cf.bl ON D D D NO D NO D REPORTABLE CCCURRENCE ACTION ITEM NO. PROMPT ON-~ITE NOTIFICATION NUMBER R. M. Ragan 5/26/81 2040 TITLE DATE TIME

~ 81-30/01+-o TITLE DATE TIME I 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION 0TPH T. Tongue 5/27/81 0730 F. A. Palmer 5/27/81 2:45 REGION Ill DATE TIME. TITLE DATE TIME

- ~TGM J. Keppler 5/27/81 2:27 REGION 111 & OOL DATE TIME Tl TLE DATE TIME RESPONSIBLE COMPANY OFFICER INFORMED OF 10CFR21 CONPITIONS ANO THEIR REPORT TO NBC TITLE DATE TIME T. Lang . .. '5127 /81 REVIEW AND COMPLETED OPERATING ENGINEtR DATE ACC~PTANCE BY STATION REVIEW AS REOU I RED DATE RESOLUTION APPROVED AND AUTHORIZED FOR DISTRIBUTION a6*5t7* 10-77 (FORM 1s-s2*t)