ML20099B598
| ML20099B598 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 10/26/1984 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-4-175, 84-03, 84-3, NUDOCS 8411190218 | |
| Download: ML20099B598 (5) | |
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October 26, 1984 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thomas E. Murley Administrator
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 General Electric Type HEA Lock-out Relays Significant Deficiency Report No. 84-03, Final Report Gentlemen:
This is the Final Report in reference to the above subject. Duquesne Light Company (DLC) notified the Region I of fice that an evaluation under 10CFR50.55(e) was underway on January 27, 1984.
An extension for the submittal of the report to June 30, 1984, was requested by Mr. S. D. Hall of DLC Regulatory Affairs Department on June 14, 1984, and was granted by Mr. Lowell Tripp of NRC Region I.
Pursuant to the requirements of 10CFR50.55(e), interim reports were s ubmit ted on February 28, 1984, and June 29, 1984.
This is the final report on this subject and it is anticipated that no further reports will be submitted.
DUQUESNE LIGHT COMPANY SUBSC IBED AND WO TO BEFORE ME THIS g DAY OF..
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, 1984.
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By l
Notary Public E. V. foolever
/NITA CLMME REITER,110 tar,Y PUBUC Vice President l
RCE NSON TOV!NSHIP. ALLEC!!EhY COUNTY f,1Y COMM;E3'CN EXF!RES CCTC3ER 20,1933 SDH/wjs Attachment I
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Mr. R. DeYoung, Director (3) (w/a)
Ms. M. Ley, Project Manager (w/a)
Mr. E. A. Licitra, Project Manager (w/a)
Mr. G. Walton, NRC Resident Inspector (w/a)
INPO Records Center (w/a)
NRC Document Control Desk (w/a) 8411190218 841026 PDR ADOCK 05000412 8
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.g, Ukited';St:tas Nuc10cr R:gulctory Cosmicci n
,Dr. Thon:o E. Mur10y'-
Page 2 COMMONWEALTH OF PENNSYLVANIA )
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COUNTY OF ALLEGHENY
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On this I
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, before me, a-Notary Public in and for said Commonwealth ~ and County, : personally appeared E. J. Woolever, who being. duly sworn,; deposed ' and said that-(1) he is' Vice President of Duquesne Light, (2) he. is ' duly authorized. to execute and ~ file the foregoing Submittal on behalf of said Company, ' and (3) the statements set forth in ;the Submittal. are true and correct' to the ' bes t of his knowledge.
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Notary Pdblic ANITA ELAINE REITER. NOTARY PUBLIC-ROBINSON TOWNSHIP. ALLEGHENY COUNTY MY COMMISSION EXPIRES OCTOBER 20,1986
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BEAVER VALLEY POWER' STATION - UNIT NO. 2 DUQUESNE LIGHT COMPANY Report on Potential Significant Deficiency No. 84-03 GE HEA Type Relays
'1.
SUMMARY
System Control (SC) had notified Stone & Webster Engineering Corporation -
(SWEC) on December 2, 1983, that a particular group of. General Electric (CE) HEA type lock-out relays had a tendency to misoperate under certain conditions.
These_ relays were manufactured'between September 1980 and
- August 1983 (with corresponding date codes of KS, LS, MS, AT through Mr, AU through MU, and AW through HW).
BVPS-2 in its initial report (2NRC-
'4-019, dated February 28, 1984) indicated SC had supplied these types.of relays with the subject date codes in panels PNL*REL-241, 249, 251, and 259.
Further investigation by SC indicated that panels PNL*REL-250,
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. 281, and 282 under purchase order 2BV-731 will have GE HEA lock-out type-relays.
In addition, 16 replacement relays were. shipped to the field under purchase order _2BV-731.
Also, 4KV switchgear under purchase order 2BV-304 and 480 volt switchgear under purchase order 2BV-307 were identified as having GE HEA lock-out type relays.
An investigation by field personnel - on panels PNL*REL-241, 249, 251, and 259, and 16 replacement relays was conducted with ' the following results:
12 relays with subject date codes in PNL*REL-241 3 relays with subject date codes in PNL*REL-249 11 relays with subject date codes in PNL*REL-251 6 relays with subject date codes in PNL*REL-259 All 16 replacement relays with subject date codes This resulted in 48 suspected relays being ident if ied.
A test was performed by field personnel in accordance with GE's instructions on the 48 suspected relays.
Two of the 16 replacement relays shipped to the tield failed the acceptance criteria given by CE while the remaining 46 relays were found to be acceptable.
Panels PNL*REL-250, 281, and 282 had not been delivered to the site at the time of BVPS-2's initial notification letter (2NRC-4-019).
Since then, panel PNL*REL-250 has been received at the site and has received a-receipt inspection, which had been revised to inspect for GE HEA relays with the subject date codes.
No relays were identified as having the subject date codes.
One relay manuf acturer's date code could not be read.
This relay was tested in accordance with GE's instructions and passed the test.
Based upon the results of this test, this relay was accepted.
Panels PNL*REL-281 and 282 will receive the same receipt inspection as PNL*REL-250 for these relays with the subject date codes once received at the site.
If any are found, the relays will be returned to the manufacturer for replacement.
An investigation was conducted to determine if GE HEA lock-out type relays with the subject date codes were installed on 4KV and 480 volt switchgear under purchase orders 2BV-304 and 307, respectively.
The u
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~that none of ' the relays ! with.the
'results L of 4 this' investigation was subject ; date ; codes were installed on the 4KV and '480 volt ' switchgear.
Junder Purchase Orders 2BV-304:and'307.
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'2.
IMMEDIATE' ACTION TAKEN Duquesne ; Light Company- (DLC) directed SWEC to ' investigate' whether any -
Class 1E equipment. for1 BVPS-2 Lused HEA relays manufactured dur~ing~ the period.iniquestion..SWEC was instructed to follow the corrective action as _ recounnended.by GE for any potential problem with anyL questionable HEA -
relays; id ntified at BVPS-2.
SWEC was also instructed to' notify DLC of s
p their findings and the' action' taken.
Mr. E. - F. Kurtz,' Jr., Manager 'of
. Regulatory Affairs, BVPS-2, notified Mr.'Lowell Tripp,.NRC Region 1,;of
-a potential' reportable significant deficiency on January 27, 1984.
t 3.
DESCRIPTION OF THE PROBLEM.
GE has reported that a design change, which was intended to increase the-relay's capability to operate at reduced voltages, : caused a limited
.a number of these rela'ys to malfunction due to shocks or vibration. These relays were manufactured between September 1980 and - August 1983 with.
date codes of KS, LS, MS, AT through MT, AU through MU and AW through l
HW.
GE recommended that a check be performed to determine.the force -
required to trip the armature.
If the force was determined to be less than 500 grams or 1.1 lbs.,
the irelay should be considered out of specification.
I 4.
ANALYSIS OF SAFETY IMPLICATION 4,_
The two relays found to be out of specification were scheduled -to be installed in' either PNL*REL-241, PNL*REL-249, PNL*REL-251, or PtL*REL-i 259.
If either relay were to have malfunctioned, this could have resulted in an inadve rt ent trans fer of control of a safety-re10ted.
i component from the main ~ control board to the emergency shutdown panet i
This event would not change the state of the trans ferred component, not would it alter the accuracy or validity of the instrument indications
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the main control room.
The inadvertent transfer ' of control could hive an adverse impact on the safety of plant operations, to the extent . hat -
it would result in operator inconvenience or additional operator act ions under certain postulated conditions.
However, this would not signifi-cantly affect the control of the plant regarding accident mitigation
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functions or safe shutdown capabilities.
Based upon the above, this is j
considered to be reportable.
5.
CORRECTIVE ACTION TO REMEDY THE PROBLEM I
The 48 CE -HEA type relays with the subject Lee codes found to date at BVPS-2 have been inspected and tested by field personnel.
Two out of the 48 relays found to date to have the sub;ect date codes failed the GE acceptance test.
These two relays have been returned to the vendor for replacement.
Any additional relays of this type with the subject date codes identified will be tested in accordance with GE instruction.
If they fail, they will be returned to the vendor for replacement, i
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1 In addition -- to the above ' corrective ' actions, BVPS-2 will use as an
.adminstrative control applied to the positioning of individual switches on the Emergency Shutdown Panel (ESP) and. the Auxiliary Shutdown Panel
. ASP) the Normal System Arrangement (NSA)1 position specified in Section
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3 of the appropriate operating manual chapters (OMC).' ' In ' addition, the OMC addressing abnormal procedures will contain _a composit'e' listing also
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specifying their NSA positions.
These 'act ions ' will. minimize the _ -impac t.
of transfer control on transfer relay' failure.
6.
ADDITIONAL REPORTS This. is - the final report on this subject. ' It - is anticipated - that no further reports will be aubmitted.
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