ML19302G581

Memorandum in Opposition to Util Motion for Clarification of ASLB 850903 Concluding Partial Initial Decision Re State of Offsite Emergency Preparedness.W/Certificate of Svc

ML19302G581
Person / Time
Site:	Perry
Issue date:	09/23/1985
From:	Lodge T LODGE, T.J., SUNFLOWER ALLIANCE
To:	Atomic Safety and Licensing Board Panel
References
CON-#385-595 OL, NUDOCS 8509260368
Download: ML19302G581 (3)

Text

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SSIN5 No. 6835 IN 85-17, Supplement 1 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C. 20555 October 1, 1955 IE INFORMATION NOTICE NO. 85-17, SUPPLEMENT 1:

POSSIBLE STICKIN3 0F ASCO SOLENOID VALVES Addressees:

All nuclear power reactor facilities holding an ope ating license (OL) or a ccnstruction permit (CP).

Purpose:

This notice is to inform recipients of the results of followup investigations regarding the reasons for sticking of Automatic Switch Company (ASCO) solenoid valves used to shut main steam isolation valves (M51Vs) under accident conditions.

Recipients are expected to review the information for applicability to their facilitico and consider actions, if appropriate, to preclude similar problems occurring at their facilities. However, suggestions contained in this information notice do not constitute NRC requirements; therefore, no specific action or written response is required.

Descriptica of Circumstances:

Information Notice No. 85-17, "Possible Sticking of ASCO Solencid Valves,"

oescribed the problem that occurred with ASCC Model HTX 832320V solenoid valves at Grand Gulf Unit 1.

General Electric (GE) and ASCO conducted tests to determine the cause and any further corrective actions. The following is a summary of the GE and ASCO tests and analyses:

Two of the three solenoid valves which f ailed at the Grand Gulf Nuclear Station also sporadically failed to transfer during testing at elevated

. temperatures. These two valves were the cnly valves that failed during these tests. However, these failures were not predictable. Subsequently, five valves from Grand Gulf service were disassembled and inspected. This-inspection identified a microscopic foreign suostance on the lower core / plug nut interfaces on all five valves.

Further evaluations of this microscopic substance were inconclusive because of the small foreign substance sample size. After cleaning and reassembly of these valves, tests were conducted on four of these five valves at elevated temperatures. These four valves functioned normally. ASCO felt certain that the valve failures resulted from high-temperature stickir; of the lower core-to plug nut faces resulting from a foreign substance or combination of substances collected at this interface.

8509260369

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IN E5-17, Supplerent 1 Oct ete r 1,1955 Page 2 of 2 A detailed dimensional analysis and comparison among the salses returned from Grand Gulf indicated that all parts were within allcwable limits and differences were not enough to cause a failure to shift. Therefcre, this examination tended to relieve concerns related to a generic design defect.

GE has attempted to locate additional foreign substance from other salves of the same type ia use at Grand Gulf to determine how- the foreign substance got in tne valve, or where it originated. GE was able to scrape some small a-nunts of foreign substance from the lower core-to plug nut interface.

However, there was not enough residue to make a definitive identification of the nature of the foreign substance.

GE has recommended that the licensee replace the potentially contaminated MSIV solenoid valves and institute a periodic examination and cleaning cf the M51V solenoid valves. Grand Gulf has replaced the eight MSIV HTXS32220i dual solenoid valves with fully environmentally qualified ASCO Model NP E323A20E dual solenoid valves. The environmentally cualified valse Model NP 8323A2CE was included in a control samole placed.in the test ovens with the solenoid valves that scuck at Grand Gulf. The environmentally qualified r., del did not stick under the test conditions that cause sticking in the other solenoid valves.

No specific action or written response is required by this information notice.

If you have any questions about this matter, please contact the Regional Acministrator of the appropriate regional office or this office.

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t ow'a r o o rdan, Director Divisi r of Emergency Preparedness and ;gineering Response Office of Inspection and Enforce ent Technical

Contact:

Eric Weiss, IE (301) 492-9005 Attachrent: List of Recently Issued IE Infor; _ ion Notices

IN 85-17 SUPP 1 September , 1985 Page 2 of 2 Further evaluations of this microscopic' substance were incenclusive because of the small foreign substance sample size. After cleaning and reassembly of these valves, tests were conducted on four of tnese five valves at elevated temperatures. These four valves functioned normally.

ASCO felt certain that the valve f ailures resulted f rom high-temperature sticking of ,he lower cort-to plug nut f aces resultir g f rom a f oreign substance or combination of substances collected at this interface.

A detailed dimensional analysis and comparison among the valves returned from Grand Gulf indicated that all parts were within allowable limits and differences were not enough to cause a failure to shift. Therefore. this examination tended to relieve concerns related to a generic design defect.

GE has attempted to locate additional foreign substance from other valves of the same type in use at Grand Gulf to determine how the foreign substance got in the valve, or where it originated. GE w;s able to scrape some small amounts of foreign substance from the lower core-to plug nut interface.

However, there was not enough residue to make a dcfinitive identificaticr of the nature of the foreign substance.

GE has recommended that the licensee replace the potentially contaminated MSIV solenoid vahes and institute a periodic examination and cleaning of the MSIV solenoid valves. Grand Gulf has replaced the eight MSIV HTAS32320V dual solenoid vahes with fully environmentally qualified ASCO Model NP 8323A20E dual solenoid valves. The environmentally qualified vahe Model NP 8323A20E was included in a control sample placed in the test ovens with the sclenoid vahes that stuck at Grand Gulf. The environmentally qualified model did not stick under the test conditions that cause sticking in the other solenoid salves.

No specific action or written response is required by this information notice.

If you have any questions about this matter, please contact the Regional Administratur of the appropriate regional of fice or this of fice.

Edward L. Jordan, Director Division of Emergency Preparedness and Engineering Response Office of Inspection and Enforcement Technical

Contact:

Eric Weiss, IE (301) 492-9005

Attachment:

List of Recently Issued IE Information Notices [

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IN EE-17 SUPP. 1 Septerter , loE5 Page ^ c' 2 rurther evaluations o' this microscopic substrnce were inccnclusive because of the anall fcreign substance satrple size. After cleaning and reassembly of these valves, tests were conducted en four of these five valves at elevateo terperatures. These four vals es functic ned normally.

ASCO felt certain that the valve f ailures resulted from high-temperature sticking of the lower core-to-plug nut 'rces due to e foreign suhtance or combiration of substances collected at this interface.

A detailed dimensional analysis and corparison arcrc the valves returned

1. rom Grand Gulf irdicated that all perts were within allowable linits and dif#erences were not e"ough to cause a failurt-to-shift. Therefore, this examir? tion tended to relieve ccncerns related to a gereric design defect.

GE has attempt (d to locate aceitional fereign sutstar.ce fro other valves of the sare t?Te in use at Grend Gulf to determine how the foreien substance got in tre valve, er where it origirated. GE was able to screpe some small enounts of foreign substance from the lower core-to-plue rut interface.

However, there was not enough residue to make a definitive identification of the nature of the foreign substance.

GE has recorrerded that the licer.see replace the potentially centaminated !<5IV sclercid valves and institute a periodic exaninatien and cleaning of the MSIV sclercid valves. Grand Gul# has replaced the eight MSIV HTXB3232CV dual scleroid valves with fully envircrr'entally qualified ASCO Model NP S323A70E dual solenoid valves. The environrentally cualified vahe Model NP E323A20E was included in a control sarple placed in the test ovens with the soleroid valves that stuck at Grcrd Gulf. The environmentally cualified nodel did not stick urder the test ccnditiers that cause sticking in the other solenoid valves.

A review of the licensee's safety-related documentation has identified another area of concern where a dual scleroid valve c# the same type that stuck, i.e.,

HTXE32320V is utilized. TFese solenoid velves are located in the CRD system at Grand Gulf and are scheduled to be replaced. These solenoid valves are'used to ccntrol the scram vent and drain valves. However, GE purchase specificaticrs may nake ? difference in the valves' design and manufacture even though they are also desigrated by the model nurber ETX832320V.

No specific action er vritten response is recuired by this ir#crmatict rotice.

If you have any questions about this matter, please centact the Fegional Administrator 0# the appropriate regicral office or this office.

Ecward L. Jordan, Director Division o# Energency Preparedress ar:d Engineering respense Office of Inspectirn and Enforcement Technical Centact: Eric Keiss, IE (301) 492-9005

Attachment:

List of Pecently Issued IE Information hotices DETEP:!E

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Attachment 1 IN 85-17, Supplement 1 Octcber 1, 19E5 LIST OF RECENTLY ISSUED IE INFORMATION NOTICES Informatien D3te of Notice No. Subiect I v., ca Issued to 85-79 Inadequate Comm.unications 9/10/85 All po-er reactor Between Maintenance, facilities t.olding Operaticas, And Security an OL or CP; research Personnel and nonpowcr reactor facilities <, fuel fabrication and processing facilities 85-78 Event Notification 9/23/85 All power reactor facilities holding an OL or CP 85-77 Fossible Loss Of Emergen_y 9/20/85 All power reactor Notification System Due To facilities holding Loss Of AC Power an OL or CP Sb-76 Recent Water Hammer Events 9/19/85 All power reactor facilities holding an OL or CP 85-75 Imprcperly 1 stalled Instru- 8/30/85 All power reactor mentation. Inadequate Quality facilities holding Control Ar.u Inadequate Post- an OL or CP noci 1 4cctica Testing 65-74 Station Battery Problems 8/29/85 All pcv.er reactor facilities nolding an OL or CP 84-7C Reliance On Water Level 8/26/85 All pcwer reactor Sup. 1 Instrumentation With A facilities holding Common Reference Leg an O! or CP 85-73 Emergency Diesei Generator 8/23/85 All po.er reactor Control Circuit logic Design 'facaiities holding Error an OL or CP 85-72 Uncontrolled Leakege Df 8/22/E5 All power reactor Reactor Coolant Outsice facilities holding Containment an OL or CP DL = Opera +,ing License CP = Construction Permit