NUREG-0879, Notification of 930915 Meeting W/Science & Engineering Assoc,Inc to Discuss Analysis Apporaches & Model Development for Work Planned Under Task 6 (Ref NRC-04-91-071) Prior to Undertaking Detailed Analyses

Notification of 930915 Meeting W/Science & Engineering Assoc,Inc to Discuss Analysis Apporaches & Model Development for Work Planned Under Task 6 (Ref NRC-04-91-071) Prior to Undertaking Detailed Analyses

ML20057A484
Person / Time
Issue date:	08/31/1993
From:	Serkiz A NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:	Baer R NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
References
CON-NRC-04-91-071, CON-NRC-4-91-71, REF-GTECI-A-43, REF-GTECI-ES, RTR-NUREG-0879, RTR-NUREG-879, TASK-A-43, TASK-OR NUDOCS 9309140285
Download: ML20057A484 (4)

Text

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UNITED STATES

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NUCLEAR REGULATDRY COMMISSION 8

WASHINGTON, D.C. 20 % 5-0001 AUG 311993 MEMORANDUM FOR:

Robert Baer, Chief Engineering Issues Branch Division of Safety. Issue Resolution FROM:

Aleck W. Serkiz Engineering _ Issues Branch Division of Safety Issue Resolution MEETING NOTICE

SUBJECT:

POTENTIAL FOR LOSS OF EMERGENCY CORE COOLING SYSTEMS IN BWRs DUE TO LOCA GENERATED DEBRIS i

i PURPOSE:

This meeting is to discuss analysis approaches and model development for work planned under Science and Engineering l

Associates, Inc. (SEA) Task 6 (Ref. Contract'NRC-04-91-071)'

prior to undertaking detailed analyses. The staff is aware of related work which has been performed or is underway and will be completed in the near future. This meeting provides l

l a forum for reviewing such work and determining how.such information should be integrated into SEA's ' analyses.

Pertinent references are included in this notice.

The objectives of Task 6 are to: a) estimate the probability of loss of LPCI/RHR in a reference BWR, assuming LOCA generated debris, using analysis methods similar to those used to analyze a PWR in NUREG-0879, Rev.1, b) develop a model for the evaluation of BWRs and c) investigate the potential effects of corrosion products and other types of debris which can be found in BWR suppression pools. This l

meeting will focus on objectives (a) and (b) noted above.

This meeting also provides an opportunity for other interested and knowledgeable parties to provide-their views and/or information related to this subject.

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Aleck W. Serkiz Engineering Issues Branch Division of Safety Issue Resolution NFf, Fi!E UB.En W..f

Enclosures:

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Draft Meeting Agenda g k/lL 6 b

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Meeting Notice Distribution i_

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Background References

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MEETING NOTICE j

l DATE & TIME:

Wednesday, September 15, 1993 l

9:00 AM to 3:00 PM LOCATION:

5650 Nicholson Lane South, Conf. Rm. B Rockville, MD 20852 l

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PARTICIPANTS:

NRC Hdqs.

P. Norian, A. Serkiz, R. Barrett, R. Lobel, P. Rush, R. Pulsifer, R. Clark, M. Jordan l

NRC Region 1: -P. K. Eapen, J. R. White SEA:

G. Zigler, R. Walsh l

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Other:

G. Hart, Ptrformance Contracting, Inc.

Rocky Sgarro, PP&L Mark Mjaatvedt, PP&L.

I D. Bessette - Duane-Arnold Plant I

Bill Houston, EPRI-Charlotte, SC-i NOTICE:

Meetings between NRC technical staff and applicants, or other industry representatives are open for i

interested members of the public, petitioners, intervenors, or other parties to attend as observers pursuant to "Open Meeting Statement of NRC Staff Policy," 43 Federal Register 28058, 6/28/78.

CONTACT:

Aleck Serkiz 301-492-3942 FAX 301-492-3892 l

--- DRAFT 9/15/93 MEETING AGENDA ---

9:00 - 9:30 Introductory Remarks and Description of Planned Effort i

(A. Serkiz) 9:30 -11:30 Discuss probability of pipe breaks, locations, selection of reference BWR, piping layouts, insulation-debris generation, etc.

Identify a generic BWR analysis model which comports with the PWR model and analysis described in NUREG/CR-0869, Rev.1, Appendix D, "USI A-43 Regulatory Analysis,"- 10/85.

12:30 - 1:30 Discuss applicable LOCA generated debris transport models, suction strainer blockage models and estimating pressures drops which are debris material dependent.

1:30 - 2:30 Discuss estimating core damage frequency related to debris blockage, potential mitigating-actions and estimating impact of taking remedial action (s).

2:30 - 3:00 Wrap-up discussions.

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-- BACKGROUND REFERENCES --

1.

NUREG-0897, Rev.1, " Containment Emergency Sump Performance," October 1985 2.

NUREG-0869, Rev.1, "USI A-43 Regulatory Analysis," October 1985 3.

Regulatory Guide 1.82, Rev.1, " Water Sources for Long-Term Cooling Following a loss-of Coolant Accident," November 1985 4.

Generic Letter 85-22, " Potential for Loss of Post-LOCA Recirculation Capability Due to Insulation Debris Blockage," December 3,1985 5.

NUREG/CR-3394, Vols.1 & 2, "Probabilistic Assessment of Recirculation Sump Blockage Oue to Loss of Coolant Accidents," July 1983.

6.

NUREG/CR-4792, Vol.1, " Probability of failure in BWR Reactor Coolant Piping," March 1989 7.

NRC Info. Notice 88-28, " Potential for Loss of Post-LOCA Recirculation Capability Due to Insulation Debris Blockage," May 19, 1988 8.

NRC Info. Notice 90-07, "New Information Regarding Insulation Material Performance and Debris Blockage of PWR Containment Sumps,"

January 30, 1990 9.

NRC Info. Notice 92-71, " Partial Plugging of Suppression Pool Strainers at a Foreign BWR," September 30, 1992 10.

NRC Info. Notice 93-94, " Potential for Loss of Emergency Cooling Function Due to a Combination of Operational and Post-LOCA Debris in Containment," April 26, 1993 11.

NRC Info. Notice Supplement 1, May 6, 1993 12.

NRC Bulletin No. 93-02, " Debris Plugging of Emergency Core Cooling Suction Strainers," May 11, 1993 13.

LER 93-007-00, " Potential Plugging of ECCS Suction Strainers by Containment Debris," July 2, 1993 l

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9/15/93 MEETING NOTICE DISTRIBUTION:

AUG 31 15G3 Central Files NRC PDR Branch Reading Files W. Minners, RES/DSIR R. Baer, RES/DSIR/EIB P. Norian, RES/DSIR/EIB A. Serkiz, RES/DSIR/EIB A. Thadani, NRR/DSSA R. Barrett, NRR/SCSB R. Lobel, NRR/SCSB P. Rush, NRR/SCSB R.M. Pulsifer. NRR/PDIII-2 R.J. Clark /M.J. Davis, NRR/PDI-2 J.R. White, RGN1/RPB2 P.K. Eapen, RGN1/EB G.S. Barber,RGN1/ Susquehanna Site G. Zigler, SEA R. Walsh, SEA G. Hart, Performance Contracting, Inc.

L. Gifford, General Electric Company L.A. England, BWROG P. Bessette, Duane Arnold Plant R. Sgarro, Pennsylvania Power & Light W. Houston, EPRI-Plant Support Group l

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