ML18157A215

Summary of Teleconference to Discuss Open Items Associated with the Review of the Advanced Boiling Water Reactor Certification Renewal

ML18157A215
Person / Time
Site:	05200045
Issue date:	06/11/2018
From:	Adrian Muniz NRC/NRO/DNRL
To:	Jennivine Rankin NRC/NRO/DNRL
Muniz A
References
Download: ML18157A215 (5)

Text

J. Rankin 1 June 11, 2018 MEMORANDUM TO: Jennivine Rankin, Acting Chief Licensing Branch 3 Division of Licensing, Siting, and Environmental Analysis Office of New Reactors FROM: Adrian Muniz, Project Manager /RA/

Licensing Branch 3 Division of Licensing, Siting, and Environmental Analysis Office of New Reactors

SUMMARY

OF TELECONFERENCE TO DISCUSS OPEN ITEMS ASSOCIATED WITH THE REVIEW OF THE ADVANCED BOILING-WATER REACTOR CERTIFICATION RENEWAL On March 1, 2018, the U.S. Nuclear Regulatory Commissions (NRC) staff held a teleconference with members of GE Hitachi Nuclear Energy (GEH) to request additional information addressing open items associated with the review of the advanced boiling-water reactor (ABWR) certification renewal. Specifically, the two following topics were discussed:

1) The staff discussed an apparent inconsistency between GEHs response to Request for Additional Information (RAI) 06.03-4 and a statement in NEDO-33878, Revision 2. The RAI states that debris settling is not expected because flow velocity in the emergency core cooling system (ECCS) piping and components exceeds settling velocity. However, this seems to be inconsistent with Tables A-4 through A-8 (NEDO-33878), in the column titled Debris Ingestion Model, where GEH states that material will tend to settle out in low flow areas in piping.

2) NEDO-33878, Revision 2, Appendix A, Tables A-4 through A-8 state, orifices that control the flow to the ECCS pump seals are susceptible to plugging by particulates larger than the inlet seal cooling line hole diameter. The orifice holes for the ECCS pumps are 0.0625 in diameter and larger. These orifice holes may become plugged with post-LOCA debris resulting in pump seal failure because the sump screen hole diameter is 0.125. GEH stated in Tables A-4 through A-8 that the effects of debris passing through the strainers on downstream components such as pumps, valves, and heat exchangers has been evaluated as required under Regulatory Guide (RG) 1.82, Revision 4.

CONTACT: Adrian Muniz, NRO/DSLE/LB3 301-415-4093

J. Rankin 2 However, the staff position in RG 1.82, Revision 4, paragraph 1.1.1.10 states that if wear or internal blockage evaluations indicate that a component may not be able to accomplish its design function throughout its mission time and that it is not practical to install a suction strainer with openings small enough to filter out debris that cause excessive damage to ECCS pump seals or bearings, the NRC expects licensees to modify the ECCS pumps or procure new ECCS pumps that can operate long term under the postulated conditions.

The NRC staff indicated that without knowing actual orifice diameters (GEH specifies as 0.0625" and larger), the NRC staff cannot determine if plugging will occur in orifices that control the flow to the ECCS pump seals and result in pump seal failure because the sump screen hole size is 0.125.

GEHs staff indicated that the information included in NEDO-33878, Revision 2, Appendix A, Tables A-4 through A-8 is generic and that actual characteristics of specific ECCS pumps for an ABWR are not known yet. GEHs staff added that Design Control Document (DCD) Tier 2, Section 3.9.6.1 (Testing of Safety-Related Pumps) was revised to state that the ECCS pumps (including mechanical seals) can perform specified functions under all design basis conditions including post-LOCA debris leading conditions and pump qualification will be validated in accordance with ASME QME-1-2007 as endorsed by RG 1.100, Revision 3 and that DCD Tier 1, Inspections, Tests, Analyses and Acceptance Criteria included in Sections 2.4.1 (Residual Heat Removal System), 2.4.2 (High Pressure Core Flooder System) and 2.4.4 (Reactor Core Isolation Cooling System) would ensure compliance of specific ECCS pumps with RG 1.82, Revision 4, paragraph 1.1.1.10.

In relation to both items above, GEH stated the NEDO document is an assessment of the ABWR design and the design in the DCD takes into account the results of this assessment.

GEH is reassessing the DCD and NEDO document to determine if clarifications are needed to reflect this point. The NRC staff is going to assess whether there is sufficient design information in the DCD to complete the review. In addition, the staff needs to evaluate whether the NEDO document should be incorporated by reference in the DCD.

There were no members of the public in attendance to this meeting.

The list of participants for the meeting is enclosed.

Docket No.: 52-045

Enclosure:

As stated cc w/encl.: See next page

ML18157A215 NRO-002 OFFICE LPM:NRO/DSLE/LB3 LA:NRO/DSLE/LB3 LPM:NRO/DSLE/LB3 NAME AMuniz SGreen AMuniz DATE 6/11/2018 06/06/2018 6/11/2018 (signed)

LIST OF PARTICIPANTS TELECONFERENCE TO DISCUSS OPEN ITEMS ASSOCIATED WITH THE REVIEW OF THE ADVANCED BOILING-WATER REACTOR CERTIFICATION RENEWAL March 1, 2018 Name Organization Adrian Muniz NRC Michelle Hart NRC Timothy Lupold NRC Edward Stutzcage NRC Olivier Lareynie NRC Foreign Assignee James Strnisha NRC Jerry Head GEH Patricia Campbell GEH Michael Arcaro GEH Alan Beard GEH David Hinds GEH Daniel Pierce GEH Walter (Skip) Schumitsch GEH Enclosure

DC GEH - ABWR Mailing List (Revised 11/17/2017)

Email APH@NEI.org (Adrian Heymer) awc@nei.org (Anne W. Cottingham) brianr.johnson@ge.com (R. R. Johnson)

Christopher.Powell@ge.com (Christopher Powell) cschlaseman@mpr.com (Caroline Schlaseman)

CumminWE@Westinghouse.com (Edward W. Cummins) cwaltman@roe.com (C. Waltman)

Dale.Wuokko@toshiba.com (Dale Wuokko) david.lewis@pillsburylaw.com (David Lewis) david.robillard@pseg.com (David Robillard)

F.Shahrokhi@areva.com (Farshid Shahrokhi)

George_Stramback@Charter.net (George Stramback) jerald.head@ge.com (Jerald G. Head)

Joseph.Ondish@ge.com (Joseph Ondish)

Joseph_Hegner@dom.com (Joseph Hegner)

Kenichi.Sato.sz@hitachi.com (Kenichi Sato)

KSutton@morganlewis.com (Kathryn M. Sutton) kwaugh@impact-net.org (Kenneth O. Waugh) lchandler@morganlewis.com (Lawrence J. Chandler)

Linda.Dolan@ge.com (Linda Dolan) lon.burnam@house.state.tx.us (Lon Burnam)

Maryann.Herzog@ge.com (Maryann Herzog) media@nei.org (Scott Peterson)

MSF@nei.org (Marvin Fertel) nirsnet@nirs.org (Michael Mariotte)

Nuclaw@mindspring.com (Robert Temple) patriciaL.campbell@ge.com (Patricia L. Campbell)

Paul@beyondnuclear.org (Paul Gunter) pbessette@morganlewis.com (Paul Bessette)

RJB@NEI.org (Russell Bell) rtrench@mpr.com (Randy Trench)

Ryan.hough@ge.com (Ryan Hough) sabinski@suddenlink.net (Steve A. Bennett) tom.miller@hq.doe.gov (Tom Miller) trsmith@winston.com (Tyson Smith)

Vanessa.quinn@dhs.gov (Vanessa Quinn) wayne.marquino@gmail.com (Wayne Marquino)

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