ML19282C800

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Forwards Addl Info Supporting Application for Shipping Cask Design Using Alternate Closure Configuration.Derived Analyses Show Impact Limiter Protects Cask Closure,Assuring Radioactive Matls Will Not Be Released to Environ
ML19282C800
Person / Time
Site: 07106346
Issue date: 04/06/1979
From: Mowry W
GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER
To: Mcdonald C
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
SHP-1046, NUDOCS 7905020387
Download: ML19282C800 (53)


Text

{{#Wiki_filter: - x L 6 1 Lv - r .... ' #:%.,; L :s.. ~. .D, .x y Ce s=wu=ur LMka :;x 2.. 1,. M. GENERAL AToMC COMPANY P o. Box 81608 SAN DIEGo, CAUFoRNIA 92138 In Reply P")453"O April 6, 1979 Refer To: SHP-1046 to 4 O Mr. Charles Mcdonald, Chief p Transportaticn Branch 1 Office of Nuclear Material Safety and Safeguards sgoOf U.S. Nuclear Regulatory Commission 89 /8/g Washington, D.C. 20555 22 4

Subject:

C0C-6346; Docket 71-6346; additional information. 'q f;

References:

(a) GAC letter SHP-959 dated 8/15/78. A d5 ~~ (b) NRC letter FCTR: RHO dated 12/1/78. (c) CAC letter SHP-1034 dated 2/27/79.

Dear Mr. Mcdonald:

This submittal contains information which, when added to our previous submit-tal, Reference (c), supports our application, Reference (a), for the subject cask's design using an alternate closure configuration. Your letter, Reference (b), raised certain questions and requested additional information. Our letter, Reference (c), supplied the requested information except for those analyses and demonstrations which are to be satisfied by a final impact limiter design. We have now performed appropriate tests on the wood samples taken from that actually intended to be used in the limiter. Our derived analysis using the test data show that the impact limiter protects the cash closure through the hypothetical accident conditions thereby assuring that radioective materials will not be released to the environment. describes more completely the information provided by this sub-mittal. provides new replacement pages for the Addendum's Rev. B to be inserted in the GADR-55 Addendum 1 Rev. A. Instructions for accomplishing the Addendum's revision are included. Attachmu.t 3 is the test specificatiot which was used to obtain cer*ain ply-wood data pertinent to the impact limiter design. Attachment 4 is the ply-wood test summary cnd evaluation. THIS DOCUMENT CONTAINS POOR QUAUTY PAGES 790502 D397

r Charles Mcdonald SHP-1046 We look forward to your early review and issuance of the appropriate license amendment. Very truly yours, tJAL/e# n' William R. Mowry Licensing Administrator Nuclear Materials Control Division WRM:hes Attachments: 1. Submittal :;ummary 2. Addendum replacement pages 3. Plywood test specification 4. Plywood test summary and evaluation

CAC ltr SRP-1046 dated 4/6/79 1.0 Submittal Summary This attachment summarizes the additional information required to satisfy Question 3 under "Haterials" contained in NRC letter FCTR:RH0 dated 12/1/78. In GAC's response to the NRC letter, final determina-tion of plywood properties and subsequent analytical verification of the cask integrity had not been completed. The information contained herein completes GAC's response to that question. The following background is provided for information: 1.1 NRC's Original Question Stated: " Provide additional identification of the impact limiter material. Material properties of wood differ significantly between grades and species and may vary considerably within a grade. Justify the use of the material properties shown on page 5-103, if they cannot be con-sidered conservative." 4 1.2 GAC's initial Response Stated: "The impact limiter material is Marine Exterior grade plywood as defined by the American Plywood Association (APA). This is superior exterior type plywood made only with Douglas Fir or Western Larch and having special solid core construction. Compression tests on samples of the plywcod purchased for fabrica-tion of the impact limiters were conducted at GAC during January 1979 Results of the tests indicated the plywood to have approximately 50% of the strength reported in Sandia Lab. Report SLA-74-0159 (Reference 1, listed on page 5-103 of GADR-55, Addendum 1). Tests were made ooth parallel and perpendicular to the grain using several samples. A sample of structural 1 C-C exterior (APA) plywood was also tested and produced similar results. Alternate materials and designs are being evaluated by applying the criteria originally used for the selection of the Marine grade plywood as reported on pages 5-103 through 5-114 or GADR 55,

Page two Addendum I, Revision A. The impact limiter will also have sufficient capability to ensure compliance with the criteria listed in Section 5A of GADR 55, Addendum I, Revision A." 2.0 Additional Response General Atomic contacted Sandia Labs. in an attempt to determine the applicability of the plywood structural properties reported in SLA-74-0159 with regard to the specific plywood chosen for construction of the FSV-l impact limiter. Sandia was unable to provide satisfactory documentation which could identify the type or grade of plywood actually used during their tests. It was therefore decided to perform at GAC the testing necessary to determine these properties. A test specification was pre-pared (see Attachment 3) which describes the specific testing to be ac-complished. Test specimens were prepared from the lot of plywood actually purchased for use in the construction of the FSV-1 impact limiter. The testing program and results are summarized in Attachment 4. In the initial submittal of GADR-55, Addendum 1, the impact limiter plywood crush criteria was established as 50% maximum since no data were available for compression stress levels above 50% crush. According to the available data, the compression stress values below the 50% crush level were nearly uniform. For the plywood selected, the uniform stress levels perpendicular (.L) and parallel (ll) to the ply were specified as 3500 psi and 5500 psi, respectively. The impact limiter sizing and requisite analysis were done initially using the above criteria. After completion of our testing program and evaluation of the re-sults, it was decided to re-analyze the existing impact limiter con-figuration. The re-analysis was based on actual test data which went above the 50% crush level. The re-analysis was performed using the ccmpression stress levels for the appropriate (1) and (11) Inadings as a function of the % of strain (crush) as shown in Figures 1 and 2 of Attachment 4. This was accomplished by utilizing a fixed stress value for strains up to 50%, and adding a " hardening factor" to the allowable (fixed) stress value for strains above 50%. The compression levels above 50% which utilized the " hardening factor" as depicted in

Page three r Figures 1 and 2 of Attachment 4 are acceptable since they occur in a small localized area as shown in the figure on page 5-128, attachment 2. This figure depicts the crush lines at variouc impact angles and tabulates the maximum crush percentage. The localized nature of the crush is apparent by selecting normal lines to any crush line and noting the local percentages. Although the stress values determined by the plywood tests were below the original values employed, there appeared to be no problem since the stresses induced in the cask are below those specified in the criteria in-cluded in Addendum 1, Rev. A. The actual values have been updated as shown on pages 5-2g and 5-2h. The addendum pages listed below were revised to reflect the re-analysis of the impact limiter and associated cask interfaces: 3-3 3-8 5-1, 5-2g, 5-2h 5-103 through 5-112 5-114C 5-114D 5-122 through 5-127 5-127A 5-128 5-129 5-148 5-149 90-SK5592, Issue E

Attaciunent 2 GAC ltr SIIP-1046 dated 4/6/79 h:/. .......-_,.....~-..~m -. r m o u...,.,. .m.,..,...~ ,-------m~o--,-~--- GEtiERAL ATCMIC COMPANY P.O. Box 81608 San Diego, CA 92138 GADR-55 ADDENDUM I REVISION B FIflAL DESIGN REPORT FOR FORT ST. VRAIN FUEL SHIPPIflG CASK Conpiled by: h/, N' Med Approved: 2/ 30 March 1979 ...ii..,.-. -i=is i-.: m i -g -= E 9 N s e + 'i~, + 0 . %:k Sth.n < ' T '. d%' g. ake [sd}Ml#4f%dky_ f7 '1 z;D W.M

SECTION III 3-3 GADR-55 ADDENDUM I Revision B 0. ASTM A579 Alloy Steel [HY140(T)1. (Ref. 9) (See also paragraph M) Physical Properties: Room Temp. 3000F 3 Density 0.285lb/fn 6 29.5 x 10 psi 28.5 x 10 psi Modulus of Elasticity Ultimate Tensile Strength 150,000 psi 140,000 psi Yield Strength 140,000 psi 130,000 psi Elongation 15% E. 6061-T6 Aluminum Alloy (Ref. 7, Figures 3.0315 and_3.062) Modulus of Elasticity at 3000F 10.4 x 106 psi Ultimate Tensile Strength at 3000F 35,000 psi 0 Yield Strength at 300 F 30,000 psi Elongation at 3000F 20% F. Douglas Fir Plywood (Refs.10 through 13) Crushing Stress parallel to Grain 3500 psi Crushing Stress perpendicular to Grain 1800 psi Shear Stress allowable (Ref.12, table 38) 1000 psi Tensile Strength perpendicular to Grain (Ref.13) 340 psi The crushing stress remains nearly constant up to approximately 50% reduction of the original thickness. Beyond approximately 50% the crushing stress increases rapidly. For the analysis in Section V, the lower of either the adhesive strength or the wood shear stress parallel to the grain was used for the shear stress allowable. G. Uranium Welds All uranium welding will be accomplished using single V-butt joints and inert de tungsten arc welding. The inert gas used for shielding and trail-ing shields shall be of welding grade argon. The filler and base metals shall be depleted uranium. Prior to use, filler metal shall be free of oxides and other contamination. Base metal shall be cleaned of oxides, oil, grease, and other weld con-taminants. Each weld bead will be cleaned prior to the deposition of the next weld bead. Final layers of each weld will be liquid-penetrant inspected. H. Stainless Steel Welds (Refs. 1 and 2) All stainless steel welds will be in accordance with the " Rules for Con-struction of Nuclear Vessels" (Ref. 1). All of the welding procedures and welders will be qualified in accordance with " Welding Qualifications" (Ref. 2). All stainless steel welds will be inspected per Ref. 1. Cracks, porosity, lack of fusion, undercutting, and overlapping will not be acceptable.

SECTION III 3-8 GADR-55 ADDENDUM I Revision B REFERENCES 1. ASME Boiler and Pressure Vessel Code Section III - Nuclear Vessels, The American Society of Mechanical Engineers, United Engineering Center, N.Y., 1965. 2. ASME Boiler and Pressure Vessel Code Section IX - Welding Qualifications, The American Society of Mechanical Engineers, United Engineering Center, N.Y., 1965. 3. " Metallic 0-Rings," United Aircraft Products, Inc., Bulletin No. 596191B, Dayton, Ohio, July 15, 1959. 4. "0-Ring Design Handbook," Plastic and Rubber Products Company, Ontario, California. 5. " Bolt, External Wrenching, Self-Retained by Washer," Standard Pressed Steel Company, Jenkintown, Pa., Part Number and Spec 1fication 69241, Sheets 1, 2, and 3, March 6,1968. 6. " Heli-Coil Screw-lock Inserts," Heli-Coil Corporation, Danbury, Connecticut, Bulletin 900. 7. Aerospace Structural Metals Handbook, Dept. of Defense. 8. Clifford. C. B., " Design and Fabrication of a Prototype Laminated Urenium Metal Shipping Cask for Large Shipment of Cobalt-60," USAEC Research and Development Report No. KY-521, Union Carbide Corporation, Nuclear Division, Paducah, Ky., April 3,1967 9. Alloy Digest. HY-130 and HY-140(T) Steel Alloy, Filing Code: SA-280. Published by Engineering Alloys Digest Inc., September 1972.

10. Memo: FSV-ME:MKN:42:79, Nichols to Ketchen dtd 4/3/79, " Summary of Plywood Evaluation Tests for the FSV-1 Shipping Cask Impact Limiter."

11. (DELETED)

12. Roark:

" Formulas for Stress and Strain", 5th Edition. 13. C. L. Mantell: " Engineering Materials Handbook",1958, McGraw.

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TABLE V-l (Cont'd) KE.V B Ref. Condition Component Stress / Strain T("F) Analysis Value Allowable Pg. I 71.36 App.B hypothetical e accident l l B(1) 30' free fall i g primary membrane 1 3 o = 50,990 psi I 0.9 Su = 57,870 psi 5-68 bottom container body .-_-__-_-_-_____________1___')0_____. cask lid primary bending 300 o = 38,970 psi 0.9 Su = 135,000 psi 5-68 does not yield Sy = 130,000 psi -___________y__ cask lid bolts 300 no significant stress due to bottom impact cask seal seal deformation 300 integrity main-integrity not reqd. tained since lid & bolts remain elastic top cask iid primary bending 300 o = 18,440 psi 0.9 Su = 135,000 psi 5-106 no yield ;ince Sy = 150,000 psi _____________ ___. ~ _ _ _ _ cask Iid bolts tensile stress 300 o = 10,450 psi 0.9 Su = 112,900 psi 5-123 bolts remain cask seal seal deformation 300 elastic integrity not reqd. E. angle cask lid bolts max. shear stress 300 1 = 16,935 psi 0.6(0.9 Su) = 67,700 5-129 psi N CQ 'o

TABLE V-1 (Cont'd) 7EC-U E5 Ref. Cor.dition Component Stress / Strain T( F) Analysis Value Allowable Pg. 7!.36/ App.B hypothetical accident a B(1) 30' free fall side cask bolts shear s tress 300 t = 49,150 psi .6(.9)Su = 67,700 5-149 psi cask seal deformation 300 integrity main-integrity not l' l tained since lid required l 6 bolts remain elastic l l _____________________________l_____________ l container bolts 300 no significant stress since lid registers with con ta i ne r B(2) 40" drop cask lid reqd. thickness 300 t = 4.75" actual t = 4.55" min. to 5-100 onto 6" prevent yielding dia pin penetration 300 no penetration none 5-101 B(3) 1475 F container lid, 600 see 15 psig, 5-6 15 hr fire housing bolts 600 F design thru & seal loading which 5-28 satisfies ASME m Sect. Ill, Class ao I design rules en l Nv container seal integrated lifetime 600 0.10 1.0 8-16

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aw3 GENERAL ATOMIC COMPANY Attachment 3 , g gj,7g,,79g {e t 1W GA 777 (Rev 5/74) y / / TEST SPECIFICATION FOR EVALUATI0fl 0F PLYWOOD USED Ifl THE FSV-1 SHIPPIfiG CASK IftPACT LIMITER Project 90 Doc. No. 15-H-13 issue cattygg o 2 ;379_ g ""^ ~ DV6S - Non Deliverable A/L 2 8 Prepared Approvals Acceptance Purpose of issue / Issue Date by Sections Changed x Engineering QA Froject 8 8 A , p;g 0 41973 M. Nichols D. W. Ketchen Initial Release f( f Q, Q, Rd h 09K B FEB 0 21979 J.H. Smith

'hecking:

Release Basis: R _rrigu,ec CNL525 (1/26/79) 7/9 Do not write in space below. Continue issue Summary on GA Form 778. Page I c' 14

GA 317 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Spec. No. 15-H-13 issue g Date TABLE OF CONTENTS SECTION HEADING PAGE 1.0 GENERAL 3 g m 2 2.0 TEST FACILITY 4 e e 3.0 TEST ARTICLES 4 4.0 TEST REQUIREMENTS 4 5.0 DOCUMENTATION 5 m 6.0 SUPPLEMENTAL TESTS 5 o FIGURE'1 7 FIGURE 2 8 u FIGURE 3 9 "c FIGURE 4 10 l FIGURE 5 10 8 FIGURE 6 11 m 5 FIGURE 7 12 FIGURE 8 13 m FIGURE 9 14 u 3 2 + Equipment No. Page 2 of

GA 317 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Spec. No. 15-H-13 issue 3 Date 1.0 GENERAL

1.1 SCOPE

This test specification covers the requirements and the procedures for evaluation testing of plywood used in the FSV-1 shipping cask impact limiter. (Reference Drawing 90-H1501-110). The FSV-1 shipping cask and trailer system is used no transport spent fuel elements from the Fort St. Vrain (FSV) High Temperature Gas-Cooled Reactor (HTGR) to the Idaho Falls 8 Irradiated Fuel Storage Facility. E

1.2 PURPOSE

This testing shall provide confirmatory information on the strength capabilities of the plywood used for the FSV-1 shipping cask y impact limiters. Because wood properties are not consistent between different i samples it is necessary to determine the strength characteristics of the particular lot of marine exterior - APA plywood used in the construction of a the three impact limiters. The results of these tests will be used to verify 8 the wood properties used in the analysis contained in GADR-55, Addendum I. t 1.3

SUMMARY

OF !!ORK INCLUDED: Fabrication of the test articles is being i accomplished by GA Component Manufacturing Division (CMD). The tests will be conducted in the Mechanical Testing Laboratory by Laboratory personnel using o existing equipment. A final report will be p'rovided by the FSV Mechanical f Engineering Branch. .5 E 1.4 QUALITY ASSURANCE: These are QAL-I Design Verification and Support j (DV&S) tests requiring the following: U 1.4.1 Nonconfomances to the test procedure shall be documented = ~ on an inspection report and then dispositioned by a Material Review Board Action. m 8 1.4.2 Measuring devices used for inspection, test and product ~ acceptance shall be calibrated to limits cormensurate with 0 the measurements being taken and shall be of current cali-S bration traceable to the NBS. 1.4.3 As-built dimensions and specific identification of each test article shall be recorded. A post-test examination of each test article shall be perfomed. Any irregularities shall be recorded in the test log. 1.4.4 All test data thall be verified by Quality Assurance and recorded in graphical fom for each test article. + Equipment No. Page 3 of

GENERAL ATOMIC COMPANY a 3u nev sno TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Spec. No. 15-H-13 issue B Date

1.5 REFERENCES

1.5.1 Drawing 90-H1501-110F, " Protective Cover and Impact Limiter Assembly - Shipping Cask." 1.5.2 GADR-55, Addendum I " Final Design Report for Fort St. Vrain Fuel Shipping Cask" - August,1978. 4 2 2.0 TEST FACILITY e e Testing will be conducted in the Mechanical Testing Laboratory y using the existing 60,000 lb. capacity tensile test machine. .E m 3.0 TEST ARTICLES Ef, A total of 24 test articles shall be prepared by CMD as follows: 3.1 Randomly select 12 of the circular cutouts left over from the i fabrication of the impact limiter assemblies. 3.2 Using Resorcinol glue, laminate three samples of 4 plies each. 3 Duplicate the techniques that were used during construction of the impact 'E limiters (Ref. 90H1501-110F). Orient the top surfaces of the plywood as shown in Figure 1. QA to verify. 52 3.3 Lay out and sequentially mark the (8) 3 + lil6 X 3 + 1/16 test 8 articles for each of the 3 samples as shown in Figur? :. QA to verify. Cut cut maintaining the orientation shown. 5 3.4 Measure and record the timensions of each test article in Figure 3. ,c QA to verify. B 3.5 Repeat the compression test as required for any additional test a ,5 articles supplied by FSV Design Engineering. 4.0 TEST REQUIREMENTS z 4.1 TEST PROCEDURE: Establish the stress-strain curve for each test article by operating the test equipment to its 60,000 lb. capacity in the ccmpression mode. 4.1.1 (8 tests) Orient test articles 1 -1, 1 -2, 1 -3, 1 -4, 2-1, 2-2, 2-3 and 2-4 as shown in Figure 4. + Equipment No. Page 4 of

GENERAL ATOMIC COMPANY GA 317 (Rev 5/74) {,. TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Spec. No. 15-H-13 issue B Date 4.1.2 (16 tests) Orient test articles 1-5, 1-6, 1-7, 1-8, 2-5, 2-6, 2-7, 2-8, 3-1, 3-2, 3-3, 3-4, 3-5, 3-6, 3-7 and 3-8 as shown in Figure 5. 4.2 TEST CONDITIONS: Normal laboratory ambient conditions. b 2 e 4.3 SPECIAL REQUIREMENTS: Care, including safety glasses, should be 8 taken to protect operating personnel from any splintering that may result during j crushing of each test article. .c 5.0 DOCUMENTATION a = j The Mechanical Testing Laboratory shall provide the data obtained from the tests specified in paragraph 4.1 in graphical form. The FSV Mechanical u Engineering Branch will prepare a formal test report including the raw data and e y an evaluation of the results compared to the values used in GADR-55 Addendum I. x B 6.0 SUPPLEMENTAL TESTS 3 6.1 Prepare test articles as follows: .c 6.1.1 Randomly select 12 of the circular cutouts left over from the fabrication of the impact limiter assemblies. ou 6.1.2 Using resorcinol glue, laminate the 12 pieces duplicating the techniques that were used during the construction of the 5 Impact Limiter Assemblies. Orient the top surface grain of ,c each plywood sheet as shown in Figure 1. QA to verify. 6.1.3 Lay out and sequentially mark the test articles as shown in e Figure 7 according to the dimensions shown in Figure 6. j QA to verify. h 6.1.4 Fabricate the aluuinum end plates (12) and assemble the test articles into the final configuration per Figure 6. Note that two samples do not include end plates and through-bolts. QA to verify. 6.1.5 Measure and record the dimensions and identify the materials ,in each test article. QA to verify. Equipment No. Page 5 of

GA 317 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Spec. No. 15-H-13 issue B Date 8 6.2 Establish the stress-strain curve for each of the 8 test atticles shown in Figure 6. 6.2.1 Test equipment shall have a minimum capacity of 400,000 lbs. 6.2.2 Orient each test article as shown in Figure 8. d 6.2.3 To prevent crushing of the aluminum end plates, align the 2 loading plates (Figure 9) as shown in Figure 8 for each test. 6.2.4 Test to the capacity of the machine or 75% compression of the test article and record the stress-strain curve for each test article. .E 6.2.5 Repeat the compression test as required for any additional test articles supplied by FSV Design Engineering. 8 5 6.2.6 QA to verify steps 6.2.1 through 6.2.5 for each test. 3 62 8u 5 2 E2 U z Equipment No. Page 6 of

GENERAL ATOMIC COMPANY a 3i7 % 3/ro + TEST SPECIFICATION FOR EVALUATI0f1 0F PLYWOOD USED IN THE FSV-1 SHIPPIfiG CASK IMPACT LIMITER Spec. No. 15-H-13 issue B Date b 2 5 2 y A 4 Y ] g, / L. '~ If >f Jllc__ _2{ j j l u il d l E ~~ -m l l M u y L~ =- ll g - ') d 3 ll1=' - ' i ll1 / f',,.'.'!I!, I i 3 2 g n 3r -/, F i,. 3 I 'I \\< (7tyE g ,f! I. I .. ~:=. -- - - --y ~ u

y

( 5 .5 E .2 u 3 FIGURE 1 e Stepped Configuration is shown only to identify grain direction on surface of each disk. + Equipment No. Page 7 of

MEML MNC QWMY a 3i7 caev 5/74) + TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED Ifl THE FSV-1 SHIPPIttG CASK IMPACT LIMITER Spec. No. 15-H-13 issue B Date n 1 -8 h 2 5 9 1 s o v $N y 2 E ? E E 1x d~ =: top DOL g 3 2o 5 .5 E X dY s% o i / h@9 J i o 6 / (n a V Mark each piece as shown including scribe and directional arrow prior 4 FIGURE 2 to cutting. Equipment No. Page 8 of

GA 317 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Spec. No. 15-H-13 issue B Date FIGURE 3 AS-BUILT DIMENSIONS Dimensions in inches (See Fig. 2 ) TEST ARTICLE W L H 2 1-1 1-2 1-3 3 1-4 1-5 l 1-6 5 1-7 l-8 i 2-1 3 2-2 5 2-3 2-4 g 3 2-5 0 2-6 2-7 u 2-8 e E 3-1 o 3-2 ~ u to 3-3 3-4 3-5 3-6 3-7 3-8 + Equiprnent No. Page 9 of

MEML MNC QMMW ,,3,7cy,,3,74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER 3 Spec. No. 15-H-13 issue Date I TEST MACHINE -b 2 Test ce ARTICLE .a 2 U[ TEST MACHINE ~ 5 { FIGURE 4 2 .I 2o .a 5 c TEST MACHINE E2 u S Tc'P TE5T 2-7 A '~'T I C' ' E' TEST MACHINE FIGURE 5 Equipment No. Page 10 of

GENL nAL AIOMIC COMPANY GA 541 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Doc. No. 15-H-13 issue B Date 4 a I k NOTE: LAYOUT SAMPLES l AS SHOWN IN 3 3 2 ~4 02 FIGURE 7. I 0 [Ek h l i.2 o I o E I 7 V C X = Y + PJ A tt I>ises siows T..o?- = s g ~ (9 f t{o. OF E II I SAD 4 PLE S N Y E i a Q En 0 A 3 A 2-234 1.o 4.74 l 3 S 2.* 4.74 3 i c '2. l.83 .70 3.23 l I h D 2. l.37 .50 2 37 a 3 e 7 9 1 x T^ ,wrmour Tecue,H ao Ts de Ata D Erc PL. ATE!. U 5 d d _2 3 c 'J o E $Y E ti < e .c s eo \\ ~ u 3 e Y 'Wy l 1 !4 AL Pt. ATE - 2 PLCS / I/g suT - 4 P' C /sXl Di A STL WASHC C - 4 PLCS Touuc7o \\ co W - L=., - 3/g TH Rr;,:.s te_TS - STL.- 2 Pt.C$ (THRCAD Stock CPTWWAN FIGURE 6. By Approved Approved Page 11 of

GENERAL Kf0MIC COMPANY GA 541 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Doc. No. 15-H-13 issue B Date E~ e JL 2 w s> c E .C \\ 2 S 2 U E' 9 'u 1-?. A-2> 3; 5 2u 5 .c ~ b 5 6' y I c 4; Y l to 2. l g -- = M Altk EAC4 PIECE As i SHowN PJCL.U bitJ 4 AARovJ PR s o R,. To ( vT T's W C. i 3 FIGURE 7. By Approved Approved Page 12 of i

GENcRAL AiOMIC COiuPANY GA 541 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF Pl.YWOOD USED IN THE FSV-1 SHIPPING CASK IMPACT LIMITER Doc. f:o. 15-H-13 issue B Date s enr E TEST MACHINE c U 2 s 2 LOADING PLATE m f> TEST ARTICLE S \\ 3 o d 73 a E_i .i_ O LOADING PLATE u E i .c TEST MACHINE 0 l e FIGURE 8. + By Approved Approved Page 13 of I

GENERAL ATOMIC COMPANY GA 541 (Rev 5/74) TEST SPECIFICATION FOR EVALUATION OF PLYWOOD USED IN THE FSV-1 SHIPPING + CASK IMPACT LIMITER Occ. No. 15-H-13 issue B Date Y .e E Y 'F - a u SEY .k = = x U i A mo E B 3 ~ E E J 3 os 8 +1 I 4\\ r ~ o E2 oz Y MATERIAL: Carbon Steel 2 Required LOADING PLATES + FIGURE 9. 2y Approved Appreeed Page 14 of f om

INTER'JAL CORRESPONDENCE GAC ltr SHP-1046 U^ #6 dated 4/6/79 FROM M. K. flichols pfp/// IN REPLY REFER TO FSV-ME:MKN:42:79 To D. W. Ketchen DATE April 3, 1979 SUBJECT

SUMMARY

OF PLYWOOD EVALUATION TESTS FOR THE FSV-1 SHIPPING CASK IMPACT LIMITER I.

SUMMARY

Several crush tests as outlined in Sections 4.0 and 6.0 of Specification 15-H-13, " Test Specification for Evaluation of Plywood Used in the FSV-1 Shipping Cask Impact Limiter," were completed to establish the strength characteristics of the Mar:ne Exterior-APA plywood from which the FSV-1 Shipping Cask Limiters were to be fabricated. Standard tensile / compression laboratory test equipment was used to crush various size test samples both perpendicular and parallel to the grain of the wood. The test values obtained were consistently lower than published data

  • that had provided the basis for the initial stress analysis. Average compressive strength values of 3256 psi perpendicular to the grain were reported in Sandia Laboratories document SLA 74-0159 for laminated fir plywood. The results of the GAC tests are shown on Figures 1 and 2.

The heavy lines on the figures show the average crush strength properties of the wood used in the impact limiter analysis. II. DISCUSSION A. Phase I Tests (No constraints) 1. Test Description The purpose of the Phase I tests was to establish the compressive stress-strain curve for several test articles as specified in para-graph 4.0 of 15-H-13. Eight articles were to be crushed perpen-dicular to the grain and 16 articles were to be crushed parallel to the grain as illustrated in Figures 4 and 5 of 15-H-13. Because of the consistency of the data only 15 articles were crushed. Seven tests (test articles 1-1 through 1-4 and 2-1 through 2-3) were made perpendicular to the grain and eight tests (test articles 1-5 through 1-8 and 2-5 through 2-8) were completed parallel to the grain. All test articles were 3" X 3" X 3" laminated blocks constructed per para-graph 3.0 of 15-H-13.

  • Sandia Laboratories Document SLA 74-0159 dated May, 1974.

FSV-f1E:MKN:42:79 D. W. Ketchen April 3, 1979 2. Test Equipment (Phase I) The Phase I tests were conducted in the Mechanical Testing Laboratory at GAC using a 60,000 lb. capacity Baldwin Universal tensile test machine with automatic plotting capability utilizing a Baldwin PDlM deflectometer. The maximum stress achieved during the Phase I tests was 6667 psi in a 3" X 3" X 3" block compressed to 60,000 lb. The test articles were loaded at a rate compatible with the dynamics of the plotting equipment. Each test took approximately 30 seconds. 3. Results (Phase I) Representative data taken from the machine plots for the seven Phase I tests perpendicular to the grain have been consolidated onto Figure 1. The graph also includes data from article 3-3 that was crushed during the Phase II tests described later. An average crush strength of 1800 psi perpendicular to the grain was determined up to 50f crush. The Phase I tests parallel to the wood grain produced considerable data scatter. This was caused by the tendency of the end panels to buckle instead of crush. Because the Phase I tests parallel to the grain were inconclusive, further testing (Phase II) was undertaken to simulate the impact limiter configuration and accurately determine the wood strength characteristics for crushing parallel to the grain. B. Phase II Tests 1. Test Description The purpose of the Phase II tests was to accurately determine the ply-wood strength characteristics for crushing parallel to the grain. It was decided to test articles representing a 1/2 scale radial section of the impact limiter constrained longitudinally by through-bolts and the aluminum superstructure. Test articles incorporating bolt spacing equivalent to 24, 36 and 48 bolts on a 42" bolt circle were selected. A set of test articles with no constraints was also faoricated for comparison with Phase I data. These Phase II test articles were con-structed as specified by paragraph 6.1 of 15-H-13. A 3" X 3" X 3" test article (3-3) was also compressed perpendicular to the grain to 26,110 psi as part of the phase II tests which were conducted in accordance with paragraph 6.2 of 15-H-13, 2. Test Equipment (Phase II) The Phase II tests were conducted on a larger, 400,000 lb. capacity tensile test machine. Displacement was measured with a dial indicator gauge and both displacement and load were recorded in discrete steps as the test progressed.

FSV-ME:MKN:42:79 D. W. Ketchen April 3, 1979 3. Results (Phase II) Figure 2 shows the recorded data in graphical form for test articles A-1, A-2, C-1 and C-2. D-1 and D-2 (48 bolt pattern) were not tested because of dimensional problems causing interference with the loading plate which prevented compression of the wood. However, valid data was obtained from the A and C articles. The indicated difference between the A and C articles is due to the orientation of the lamina-tions within the article rather than the bolt spacing. The data from the B test articles (unconstrained) are not shown on Figure 2. The test. articles were laminated by orienting the top surface grain of each plywood sheet at right angles as shown in Figure 1 of 15-H-13. The test articles were then cut, as specified by Figure 7 of 15-H-13, to produce a different grain bias for each set of test articles. This bias was intentional to evaluate the effect of grain orientation on crush strength. The results of the tests on the A and C articles show the effect of grain orientation on crush strength. For construction of the side impact area of the impact limiter, the plywood sheets were randomly oriented and, therefore, the average of the data shown on Figure 2 is representative of the strength expected from the finished part. An average crush strength of 3500 psi parallel to the grain was determined up to 50% crush. Attachments MKN:er cc: R. M. Burgayne C. M. Charman L. D. Johnson R. L. Moore W. R. Mowry DF.

plywood COMPoE$ tion TESTS MArcut E XT. - A P A _L. To CRA5M t TEST S P E C, IS-H - 13 28000 V Y o k 24000 TEST ART 4CLE 3.0, . <,-- G R A i N + 2o000 y' 'I TEST M AcHNE ( 16CCD Gi D. I to 0 12.000 W ctt-4 3 l 8003- / m/ RANGE O F D/sT A 8 TEST ARTICLES 1460 pal ,( c-e 4000 AVERAGE 7" * *" CRUSH STRE NGTH I A f s-gO^O-e 50 % cRv:H O i t i i I O O.' l.T l. !: 2.0 COM PRESSIO N ~ INCHES FIG. I

PLY WOO D COM PRE S$ ton TESTS M ARs N E EXT. - A P A ti TO GRAIN -Tt4 rough SOLTS SPEC.

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