ML20046B157
| ML20046B157 | |
| Person / Time | |
|---|---|
| Site: | 07109230 |
| Issue date: | 07/28/1993 |
| From: | Withee C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 9308030190 | |
| Download: ML20046B157 (61) | |
Text
GAR Rf C(,g f
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/ 'E UNITED STATES NUCLEAR REGULATORY COMMISSION
(
.s
,8 WASHINGT ON, D.C. 20555 @ 01 STSB:CJu (JUL 2 81E 71-9230 MEMORANDUM FOR:
1The Filei FROM:
Carl J. Withee, STSB, IMNS, NMSS
SUBJECT:
MEETING
SUMMARY
CONCERNING MODEL NO. BR-100 PACKAGE Attendeet NRC BWFC DOE-HO DOE-Idaho Ross Chappell George Vames Bill Lake Tom Zielinski Carl Withee Bill DeCooman Henry Lee Mahendra Punatar E.R. Johnson BW-Research Nancy Osgood Donald Nolan Pat Doran Li Yang Robatel Meraj Rahimi Jean Fran ois Lafleur Introduction A meeting was held at the request of Babcock and Wilcox Fuel Company at Rockville, Maryland, on July, 15, 1993, to discuss the Model No. BR-100 spent fuel shipping cask. The meeting was held to inform the NRC of changes in the cask design and some of the structural analyses. A copy of the meeting agenda is attached.
Discussion The applicant discussed the new basket design which contains borated aluminum that only carries load in compression and is sealed in a water tight barrier.
The basket assembly steps were described. The basket structural analysis was discussed and the stress on the fuel can welds to the end plates will be analyzed. The allow;ble stresses in the basket material will be adjusted for time at temperature. The buckling analysis of the fuel cans was discussed, and it was determined that a free body diagram would be helpful and the axial thermal stresses should be checked. The basis for the lead data used in the analysis was presented by the applicant.
It was suggested that the applicant schedule another meeting to discuss the basket analysis when it is more complete and to discuss the testing plans before testing starts.
,f
(,b l Carl J. Withee Storage and Transport Systems Branch Division of Industrial and Medical Nuclear Safety, HMSS
Attachment:
Meeting Agenda bb h E f,k b
6 930B030190 93072s PDR ADOCK 07109230 IO
+
C PDR g9 1\\
t IJUL 2 81993 STSB:CJW Distribution:
- NRC FC w/o attmt NMSS r/f w/o attmt STSB r/f w/o attmt Attendees w/o attmt MEMORANDUM FOR
The File Meeting Notebook w/o attmt NRCLPDR v FROM:
Carl J. Withee, STSB, IMNS, NMSS
SUBJECT:
MEETING
SUMMARY
CONCERNING MODEL NO. BR-100 PACKAGE Attendees NRC BWFC DOE-HO DOE-Idaho Ross Chappell George Vames Bill Lake Tom Zielinski Carl Withee Bill DeCooman Henry Lee Mahendra Punatar E.R. Johnson BW-Research Nancy Osgood Donald Nolan Pat Doran Li Yang Robatel Meraj Rahimi Jean Frangois Lafleur Introduction A meeting was held at the request of Babcock and Wilcox Fuel Company at Rockville, Maryland, on July, 15, 1993, to discuss the Model No. BR-100 spent fuel shipping cask. The meeting was held to inform the NRC of changes in the cask design and some of the structural analyses. A copy of the meeting agenda is attached.
Discussion The applicant discussed the new basket design which contains borated aluminum that only carries load in compression and is sealed in a water tight barrier.
The basket assembly steps were described. The basket structural analysis was discussed and the stress on the fuel can welds to the end plates will be analyzed. The allowable stresses in the basket material will be adjusted for time at temperature. The buckling analysis of.the fuel cans was discussed, and it was determined that a free body diagram would be helpful and the axial thermal stresses should be checked. The basis for the lead data used in the analysis was presented by the applicant.
It was suggested that the applicant schedule another meeting to discuss the basket analysis when it is more complete and to discuss the testing plans before testing starts.
49/
Carl J. Withee Storage and Transport Systems Branch 1
Division of Industrial and Medical Nuclear Safety, NMSS r
Attachment:
Meeting Agenda OFC STSB
,C STSB-CJWithee h RCEaNEIl NAME DATE 7/,f'//93 7/?s/93 C = Cover E = Cover & Enclosure N = No Copy 0FFICIAL RECORD COPY
pj i
BR ' 00 ih FORIV A-lON ME ETih G JULY 15,1993 t
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STRESS ALLOWABLE NONCONTAINMENT CLASS 2/3 COMPONENTS STRESS CATEGORY ALLOWABLE STRESS PRIMARY MEMBRANE STRESS Sy INTENSITY PRIMARY MEMBRANE + BENDING GREATER OF 1.5S OR Sy STRESS INTENSITY RANGE OF PRIMARY +
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MKP 7/15/9
BASKET - MATERIALS OF CONSTRUCTION
- BASKET SHELL ASME SA-240, TYPE 304L 2
- NEUTRON ABSORBER BORATED ALUMINUM 60mg/cm B10
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INDIVIDUAL FUEL CAN ANALYSIS e
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n 7/15/93
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TO PRECLUDE BUCKLING WITH 1.34 MARGIN X = 4 in L = 11.6 in X = 5.4 in L = 16 in OPTION 1 FOR TOP TWO AND BOTTOM TWO WAFERS lNCREASE THICKNESS FROM 4 TO 5.5 in A WEIGHT 157 POUNDS OPTION 2 ADD ONE TOP AND ONE BOTTOM WAFERS TO REDUCE WAFER SPACING TO 11.5 in A WEIGHT 210 POUNDS 7/15
1' BASKET TESTING i
OBJECTIVE DEMONSTRATE THAT REGULATORY (10CFR71)
FREE DROP TESTS DO NOT SIGNIFICANTLY AFFECT BASKET CRITICALITY CONTROL e
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BASKET MODEL / SIMULATED CASK ASSEMBLY
/ CASK SIMUIATION
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TOP END PISTON (7JEL CELLS WEIGHT) i 29 7/15/93
a BASKET TEST MODEL
- BASKET MODEL DESIGN AND FABRICATION SHORT LENGTH (8 TO 10 INCHES LONG)
QUARTER SCALE CROSS SECTION OF THE FUEL CANS XM-19 MATERIAL, SAME AS FULL SCALE DESIGN FUEL CAN FABRICATION PER~ ASME SECTION lli, SUB SECTION NG DUMMIES REPRESENTING FUEL WEIGHTS AXIAL.-LOAD REPRESENTED BY PISTON IN THE CAVITY eSIMULATED CASK STEEL CYLINDER i
QUARTER SCALE DIMENSIONS AND WElGHTS CAVITY FOR LOCATION OF BASKET MODEL eQUARTER-SCALE IMPACT LIMITERS 7/15/9 l
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6 BASKET MODEL - TEST. ORIENTATIONS I) O' Basket Orientotson
- 2) 45' Basket Orientation AACCELEROMETERS CASK TOP END l
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4 2 &
a 4 O' Cosk Orientation 180*..Cosk Orientation 2 pairs of accelerometers are tocated symmetricotty on each side of the top hatf of the cask.
MP 31 7/15/93
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BASKET MODEL - TEST SEQUENCE Free Drop Slap-Down BOTTOM TOP ANGLE TBD 30 feet L
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1) 0 BASKET ORIENTATION CASK ORIENTATION O
- 2) 45 BASKET ORIENTATION CASK ORIENTATION 180 l
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BASKET VERIFICATION TESTING TEST SEQUENCE - TWO DROP TESTS
- SLAP-DOWN 30 FOOT DROP BASKET ORIENTATION O e SLAP-DOWN 30 FOOT DROP BASKET ORIENTATION 45 SECOND-lMPACT ON BASKET SIDE CASK ROTATED 180 BETWEEN DROPS TO USE SAME IMPACT LIMITER FOR FIRST IMPACT I
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BASKET VERIFICATION TEST EXAMINATION e
PRE-TEST
- FUEL CELL GEOMETRIC CHARACTERIZATION
- VISUAL INSPECTION / PHOTOGRAPHY e
DURING TEST
- HIGH SPEED. PHOTOGRAPHY
- ACCELEROMETERS
- VIDEO TAPES e
POST TEST
- FUEL CELL GEOME
~^ CHARACTERIZATION
- VISUAL INSPECTION.
HOTOGRAPHY
- IMPACT LIMITER CHAhACTERIZATION 7/15/93
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STRESS DERIVED FROM ENERGY FROM DROP TEST APPROX. 95 % OF ENERGY ACCOUNTED FOR PLOTS NOT ACCURATE IN ELASTIC RANGE Vames 3 7/15/93 L-.......
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a OLD TEST DATA TEST FROM 1929 (AND BEFORE)
TEST SPECIMENS UNCONSTRAINED (SAME AS 1970 DATA)
ENERGY BALANCE (DESIGN FLOW PRESSURE)
VALUES FROM 3,700 TO 18,850 PSI REPORTED FOR PLUMMER'S LEAD VALUE OF 8,500 PSI SUGGESTED FROM DROPPED SPHERE TESTS FOR CASK LEADS 1965 CONSTRAINED TESTS (LEAD IN STEEL POT) i INDICATE 10,300 PSI
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CONSTRAINED VS UNCONSTRAINED.
HOOKE'S LAW (LOAD IN X DIRECTION)
UNCONSTRAINED a, = a, = 0 a, = Ee, I
CONSTRAINED (CASK APPLICATIONS) 2 e, = e = 0 a = [(1-v)/(1-r-2v )] Ee z
x x
For Lead (v =.4) a = 2.14 Ee x
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CONCLUSIONS a
OLD (1929) AND NEW (1970) TEST DATA ARE CONSISTENT CONSTRAINED (1965) AND UNCONSTRAINED (1929,1970, ETC.) TEST DATA ARE CONSISTENT WHEN COMPARED ON SAME BASIS RECOMMENDED DFP OF 10,300 PSI IS CONSERVATIVE FOR CASK APPLICATIONS Vames 9 6/3/93-
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