ML20024D331
| ML20024D331 | |
| Person / Time | |
|---|---|
| Issue date: | 06/08/1983 |
| From: | Advisory Committee on Reactor Safeguards |
| To: | Advisory Committee on Reactor Safeguards |
| References | |
| ACRS-2111, NUDOCS 8308040547 | |
| Download: ML20024D331 (12) | |
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DATE ISSUED.
6/8/83 f D R 61a683 ACRS ADVANCED REACTORS SUBCOMMITTEE MEETING JUNE 7,1983 WASHINGTON, DC
Purpose:
The purpose of the meeting was to review the NRC-RES program in LMFBR research for the ACRS report to the Commission on the FY 85-86 budget.
Attendees:
Principal meeting attendees included:
ACRS NRC M. Carbon, Chairman R. Wright C. Mark, Members P. Wood P. Boehnert, Staff *
- Designated Federal Employee Meeting Highlights, Agreements, and Requests 1.
Dr. Carbon called the meeting to order at 1:00 p.m.
2.
Mr. P. Wood (RES) indicated that dde to Mr. R. Curtis' suspected heart-attack, he will be responsible for management of the LMFBR work. He said the LMFBR research budget for FY 83 is ~$7.3M, for FY 84 it is expected to tie N57.5M.
For FY 85 and FY 86, the budget should stay at the $7.5M level, but this figure is quite tentative given the uncertainty of CRBR funding.
Mr. Wood reviewed the present and future LMFBR research programs by FIN element (Figures 1-5).
Key points of the discussion included:
- Dr. Carbon didn't see why additional SIMMER code analyses of the CDA are required, given the definitive work of Drs. Bell and Theofanous.
Mr. Wood indicated that work will continue in the form of sensitivity studies both to quantify uncertainties and to understand the effect on safety margins introduced by the assumptions made in the work of Drs. Bell and Theofanous. He also sees a need for improvements in SIMMER for post-CRBR LMFBR's.
DESIGNATED ORIGINAL 8308040547 830608 ACRS Cortified By b (j. R
$1
3 Advanced Reactors Meeting June 8,1983
' NRC indicated that DOE it now looking very hard at the use of a pool-type LMFBR for commercial size plants.
- RES has started work to develop a report that details the technical basis for the LMFBR source term.
In response to Dr. Carbon, Mr. Wood said this work will be on a realistic basis as will the resulting source term. The ORNL aerosol release and transport work (Figure 3) supported by work at Sandia (Figure 4) comprises the whole of the source term effort.
In response to Dr. Carbon, Mr. Wood said that he would estimate that it will cost N$30M to obtain the information to develop a realistic source term for a commercial size LMFBR.
2.
In response to previous ACRS recommendations in its recent Reports to the Congress and Commission,, Mr. Wood said the Committee recommended that money be spent to develop a regulatory position on LMFBRs. NRC has been unable to respond to this request, due to the requirement to support the CRBR CP licensing effort.
In response to the ACRS recommendation that post-CRBR design criteria be developed, RES has agreed with NRR that the NRR CRBR Project Office take the lead in developing post-CRBR design criteria after the CP review is complete. ACRS also recommended NRC do a PRA on CRBR.
The NRC management will not support this effort however, unless the national effort on LMFBR's is significantly increased in the future.
Dr. Carbon asked if RES has enough money to do its job. Mr. Wood said l
that for CRBR licensing support the current budget is barely sufficient at the present level of $7.5M/ year.
If a large LMFBR development program i
is initiated, a budget of *$15-18M/ year would be adequate.
Mr. R. Wright (RES)saidtbatat N$12M/ year the present program would be much more efficient that it is now.
Dr. Mark observed that NRC has not been asked for any input for the on-going 00E LMFBR conceptual design effort.
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3.
Mr. R. Wright discussed the program on CDA energetics and core debris coolability experiments and analysis models. The program is divided into three parts to address the CDA:
(1) initiation phase issues; (2) core transition phase issues, and (3) core disassemb.ly phase issues.
The initiation phase program included fuel disruption experiments run in ACRR.
A program of transient axial fuel relocation experiments will be jointly funded by NRC and KfK (Germany) (Figure 6).
A series of transition-phise experiments (TRAN) to study fuel removal in ACRR was shown (Figure 7-8).
An analytical model (PLUGUM) will be developed and refined based on the TRAN experiment results. This program is jointly funded, with a Japanese contribution of ^'$1.0M.
The funding level for the overall energetics work isas$1.5M/ year for FY 84-85.
The core debris coolability program was briefly reviewed (Figure 9).
This is a jointly funded program between NRC (45%), Euratom (35%) and Japan (20%).
4.
In response to Dr. Carbon, Mr. Wood said that if the budget is kept betwaen $7.5M - $12M, NRC can carry along a cadre of people for a viable program should the Nation wish to pursue a vigorous LMFBR effort in the future.
In response to a Subcommittee question as to program contingencies if the CRBR is cancelled, Mr. Wood said the current budget level will I
allow funding appropriate with the presently perceived long-term research needs.
5.
The meeting.was adjourned at 4:10 p.m.
NOTE: Additional meeting details can be obtained from a transcript of this meeting available in the NRC Public Document Room,1717 H Street, N.W.,
Washington, D.C., or can be purchased from Tayloe Associates,1625 I
- Street, N.W., Suite 1004, Washington, D.C. 20006,(202)293-3950.
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FIN A1054 (SNL) LMFBR CONTAINMENT STRUCTURAL INTEGRITY o
1.
THE PROGRAM ON S0DIUM CONCRETE INTERACTIONS IN SUPPORT OF CRBR LICENSING HAS BEEN REDUCED TO LOW LEVEL AND BUDGET CUT IN HALF.
IN 1984 EMPHASIS WILL BE SOURCE TERM EVALUATION AND EFFECT 2.
OF SODIUM ON FP TRANSPORT AND AEROSOLS.
o FIN 1362 (SNL) CONTAIN CODE APPLICATION 1.
ANALYSIS OF CRBR CONTAINMENT LOADINGS WILL CONTINUE.
2.
PLUGGING OF VENT PIPES AND OTHER PATHWAYS IN CRBR WILL BE INVESTIGATED.
3.
SCRUBBING OF NA-CONCRETE AEROSOLS BY NA POOLS WILL BE STUDIED.
4.
EVALUATION OF FILTER / SCRUBBER SYSTEMS WITH EMPHASIS ON RELIABILITY FOR RISK-ASSESSMENT.
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FIN A1172 (SNL) ELEVATED TEMPERATURE MATERIALS ASSESSMENT o
LONG TERM PROGRAM TO HELP ESTABLISH MATERIALS DESIG 1.
AND DATA BASE.
PROGRAM WILL CONTINUE TO PROVIDE DATA BASE AND LONG TERM 2.
MATERIALS EVALUATION FOR CRBR AND GENERIC LMFBR's.
FIN A72ti2 (LANL) ACCIDENT INITI ATION FROM COMP 0NENT STRU NEW (1983) PROGRAM TO PROVIDE BASIS FOR EVALUATION OF CRBR 1.
SUBMITTALS IN THERMAL STRIPING, RESIDUAL STRESS, LEAK BEFORE BREAK, ELEVATED TEMPERATURE HIGH CYCLE AND CREEP-FATIGUE.
FUTURE WORK WOULD PROVIDE BASIS FOR ESTABLISHMENT OF DESIG 2.
CRITERIA.
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INITIATION PHASE PROGRAM FUEL DISRUPTION (FD) EXPERIMENTS IN ACRR UNDER LOF CONDITIONS COMPLETED FY 83 o
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. PROVED UTILITY OF OPTICAL DIAGNOSTICS TECHNIQUE FOR ACRR EXPERIMENTS 27 TESTS RUN SANDPIN MODEL SHOWED THERE IS NO EARLY SHUTDOWN FROM F.G. FUEL DISPERSAL IN SUPER-
. PROMPT CRITICAL EXCURSIONS o
NEW SANDIA TRANSIENT AXIAL RELOCATION (STAR) EXPERIMENTS (FORMERLY CFR)
CLAD AND FUEL RELOCATION INTO UPPER BLANKET STRUCTURE - BLOCKAGE FORMATION MULTI-PIN BUNDLE CONFIGURATIONS (T0 8), ARGON FLOW, OPTICAL DIAGNOSTICS FRESH AND IRRADIATED FUEL NRC KFK-6 FY 83 2
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CORE DEBRIS C00 LABILITY I
NEED:
o DEBRIS FORMATION AND CHARACTERIZATION l
o DEBRIS-BED DRY-00T LIMITS, INCLUDING BED DYANMICS f'
o, POST-DRY-0UT BEHAVIOR, INCLUDING MELT PROGRESSION o
EX-VESSEL LONG-TERM DEBRIS C00 LABILITY l
JOINT PROGRAM:
NRC (l45%), EURATOM (35%), PNC (20%)
COMPLETED REFRACTORY MATERIALS TEST PROGRAM FOLLOWING D-5 CRUCIBLE FAIL l
FY 83:
o f
TA 10W STILL THE PREFERRED MATERIAL COMPLETED OUT-0F-PILE SYSTEMS TEST FOR D-10/13 BOTTOM-COOLED CAPSULE DE i
o TWO DRY-CAPSULE ACRR EXPERIMENTS ON EXTENDED DRY OUT TO STEEL AND FUEL o
[
MELTING MODEL DEVELOPMENT FOR BED BOTTOM COOLING, CHANNELING, DISRUPTION, AND o
I I
POST-DRY-00T BEHAVIOR EURATOM FUNDING FOR ADDITIONAL YEAR OF PROGRAM NOT YET CERTAIN I!
FY 8'4:
o I!
FINAL TWO S0DIUM-COOLED EXPERIMENTS D-10 AND D-13 WITH BOTTOM COOLING, o
1 f,!
EXTENDED DRY OUT, BED DYNAMICS, AND STRATIFICATION o
MODEL VERIFICATION WITH RESULTS OF D-10 AND D-13 INVESTIGATE POSSIBLE FOLLOW-0N WORK BY NRC AND PNC, INCLUDING EX-VESSEL o
LONG-TERM DEBRIS C00 LABILITY
-