ML20028B933
| ML20028B933 | |
| Person / Time | |
|---|---|
| Site: | 07109151 |
| Issue date: | 11/23/1982 |
| From: | Mallory C HITTMAN CORP. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20028B934 | List: |
| References | |
| 21618, HN-E656, NUDOCS 8212130055 | |
| Download: ML20028B933 (8) | |
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(i, fA Mr. Charles MacDonald, Chief
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h Transportation Branch 2 g g gN D U.S. Nuclear Regulatory Commission 9- 'Nss "p Washington, D. C. 20555 wxs Subj ect: HNDC HN-100 Series 3A M sectice Radioactive Materials Package g Certificate of Compliance No. 71-9151 N
Dear Mr. MacDonald:
Reference is made to your October 18, 1982 lutter which requested additional information relative to our July 15, 1982 application for the certification of the HN-100 Series 2 casks as HNDC HN-100 Series 3A casks. Pursuant to our November 12, 1982 meeting, the request to upgrade the weight of contents of these casks from 14,000 pounds to 19,005 pounds is being withdrawn. Attacinent A contains the information requested by your October 18, 1982 letter and a listing of the other changes that have been made in the safety analysis report and the referenced drasings. Eight copies of the following revised documents are submitted for this application. (1) Addendum to the Safety Analysis Report for the HN-100 Series 3A Radwaste Shipping Cask, STD-R-02-004, Rev. 1. (2) Hittman Nuclear & Development Corporation Drawing Nos. : STD-02-020, Rev. 1; STD-02-021, Rev. 1; STD-02-022, Rev. 1; STD-02-023, Rev. 1; STD-02-024, Rev. 0; STD-02-025, Rev. 1; and STD-02-026, Rev. O. By our letter oE May 21, 1982, application was made to extend Certificate of Compliance No. 9079 to December 31, 1982, to allow time for the physical upgrading of the HN-100 Series 2 cask. This extension was grant.ed by Re71sion 8 to Certificate of Compliance No. 9079 issued on July 19, 1982. It is understood that a separate application for the renewal of Certificate of Compliance No. 9079 is being made. If Certificate of Compliance No. 9079 is not renewed by December 31, 1982, it is requested that the present certi-ficate be extended to July 31, 1983. This will allow time for the HNDC HN-100 Series 2 casks to be modified and action to be taken on the renewal application. ti (e21213o055 821123 ADOCK 07109 pur m u,
O f 0Ih Page 2 Mr. Charles MacDonald November 23, 1982 HITTMAN recognizes'that the attached information which is stamped " Proprietary" will be placed in the Nuclear Regulatory Commission Public Document Room. If you have any further questions or require additional'information, please contact me. Very truly yours, ^ C r es W. llory DirectorQ, neering lh Attachments O u._, J
1 ATTACHMENT A Radioactive Materials Package Amendment to Certificate of Compliance No. 71-9151 HNDC Model HN-100 Series 3A A. Responses to U.S. Nuclear Regulatory Commission Letter, FCTC: RHO, 71-9151, dated October 18, 1982 Drawings 1.- Dimensional controls (flatness, surface finish, etc) on the sealing surfaces were not specified and were not documented as part of the construction of the HN-100 Series 2 casks, Unit 6 through 11. The adequacy of the ceals will be checked by the yneumatic pressure test specified in Section 7.0 (page 68). The removal of paint to measure and record the flatness, surface finish, etc. is not considered necessary, provided that the seals are shown to be adequate. Should it be necessary to replace components, the dimension controls shown on the HN-100 Series 3 drawings will be specified. Note 4 and dimension tolerances have been added to the HNDC Drawing Nos. STD-02-021, STD-02-023 and STD-02-025 to cover components procured after October 31, 1982. Torquing requirements are specified in the Stud Torquing Procedure, HNDC-0-1002/3/3A which is part of the HNDC Rad Services Manual supplied to all users of the cask. A note has been added to HNDC Drawing No. STD-02-020 referencing the Cask Handling Procedure, HNDC-0-001-2/3/3A and the Stud Torquing Procedures, HNDC-0-1002/3/3A. 2. Drawing Number STD-02-020 has been revised to include the dimensions of the primary lid and shield plug gaskets. The materials lists on Drawing Nos. STD-02-021 and STD-02-023 have been revised to specify the -width of the spacers in addition to the thickness. Drawing No. STD-02-020 has been revised to show an acceptable gasket joint detail. 3. The dimensional data and material specifications for the ratchet binders is contained in HNDC Document No. C001-SD-059, Rev. O. A copy is attached for information. 4. The notes on Drawing Nos. STD-02-021, STD-02-022, STD-02-023 and STD-02-025 have been revised to read, " Welding shall be in accordance with ASME Code Section IX or AWS D1.1, weld symbols per AWS". The codes were specified on the original drawings and the fabricator has certified compliance with the drawings and specifications. 5. The designation of the 1/8 inch fillet weld on Drawing No. STD-02-021 "s been corrected.
Pago 2 c. 6. The weld symbols on Drawing No. STD-02-022 and STD-02-023 have been s changed to conform with AWS. 7.- Tho' drawings have been reviewed and " reference" d imensions are not used for all items included in the' structural analysis. Reference dimensions are used only on major ' dimensions, i.e. : helght, diameter, etc... which have relatively broad tolerances. t St ructural [ 1. The. references to the materials properties have been included in the safety analysis report on pages 4 (A36, A516,Gr '70, A311' GrL1137). and ~44 (AISI 1008). Drawing No STD-02-023 has been revised to specify A320 Grade L7 steel-for the studs on the shield plug' cover (Item 5). Properties for this material are contained in ASTM Standard, Part 1 and are greater than the A582 and A276 material originally specified. 2. The vertical dimension of the ratchet binder lug shown on page 54 has been changed from 3-1/2 inches to 4-1/2 inches and is now consistent with the dimensions shown on pages 47 and 55. The upper ratchet binder lug is shown on Drawing Noi STD-02-023 and the material list has been . changed to show that this lug will be constructed of A516 Grade 70 steel. 3. Since standards and guidelines have not been formally promulgated for Protection of ferric steel shipping containers against brittle fracture, the request to upgrade the capacity of the HN-100 Series 3A cask to 19,500 pounds is being deferred. The 14,000 pound limit on contents specified in the present certificate of compliance will continue. Containnent A gasket joint seal was made in a.section of gasket material which has been in : stock since February, 1982. (The material had been produced by the manufacturer at least two months earlier.) The joint was subj ected' to com-pression tests in which the 3/8 inch thick gasket was compressed to 1/8 inch. . In all cases, the gasket fully recovered and tl.ere was no evidence of-cracking in the joint. Operating Procedures-1. References to applicable appendices previously submitted as part of STD-R-02-001, " Safety Analysis Report for the HN-100 Series 3 Radwaste - Shipping Cask", have been included on pages 67 and 68. 2. Appendix A has been revised. 3. Section 2.0 of Appendix A has been revised to inicude the drain plug.
Page,3 i n 4.. It has.been determined by testing that the gasket can be adequately compressed by a man. tightening.the ratchet. binders in the specified sequence. The force exertep-by-a man on the ratchet binder will range'from 100 to 150 pounis. This will result in a force of 34,000 poundsLon the gasket :(8 ratchet binders @ 3500 = 28,000 + weight of lid @ 6000 = 34,000 lbs.). ItThe gasket could be-improperly seated only i if this force was not applied uniformly. Step 4.2.3.5.6 assures that the lid has been uniformly seated thereby assuring adequate gasket ~ compression. 5. The torquing crquence and the required torque to maintsin, the shieldt plug seal is specified in Stud Torquing Procedure, HNDC-0-1002/3/3A. As discussed above, this is part of' the Rad Services Manual provided to all users of the cask. 6. The drain plug has been added to the Pre-Release Checklist. Acceptance, Tests & Maintenance Program 1. Appendix C and E now reference STD-R-02-001. 2. Sealing surfaces, alignment of lids and closure devices have been added to the list of items to be inspected. 4 [. 3. Attached for information, is a copy of the procedure for the gamma scan of the cask af ter modification. The criteria for acceptance, "no individual reading greater than three greater than the average readings" is based on meeting the requirements of "10mR'at two meters" and "no single reading greater than 100 mR surface".. Users need not be notified if this criteria is met.- It is not believed appropriate to include the gamma scan procedure in the safety analysis. 4. The " Acceptance Tests & Maintenance Program" hac be. a modified to - require pneumatic pressure tests af ter major modifications, extensive or any accident which could concievably damage the sealing surfaces. It is not considered necessary to perform pneumatic pressure tests as part of the routine scheduled maintenance program. B. Other Changes Drawings 1. Drawing STD-02-020 has been revised to lengthen the shoulder. bolts (Item 16) and the ratchet binder pin (Item 19). 2. Notes have been added to drawings STD-02-021, STD-02-023, and i STD-02-025 that any parts, as indicated in the List of Materials, fabricated after October 31, 1982, will be made of ASTM A516 Gr 70. i. 3 a 4-p w.- w y ~- -, ,-,-,-s ---,-,e----.---w- .,--~u -*....r--<-..~,.--~.,*,c,.
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t Page 4 s Structural 1. Section 2.7 - Revised cask body weight to include addition of tic-down lug reinforcing plates.. Reflected this weight in. total unloaded cask weight. Although maximum payload.will remain 14,000 pounds, and thus the gross weight is 48,700 lb. (including new empty cask weight), the structural analysis was done using a gross package weight of 53,005 lb. A footnote explaining this was added. 1 2. Section 2.8.2.- Maximum weight of contents was revised to 14,000 lb. 3. Section 3.1.4.1 - Package weights for the analysis were revised based on the new empty cask weight and 53,005 gross weight. This pilows a maximum 18,305 lb. of contents, which is used in che analysis. A footnote explaining this was added. 4. Section 3.1.5.1 - Cask-center of gravity was revised to reflect the new weights. 5. Section 3.2.6.2 - Analysis examining effects of bottom corner drop on balance of cask has been redone using revised cask and payload weights. Results are satisfactory. 6. Section 3.2.6.2 - Analysis examining effects of one foot drop on top corner of long flat edge has been redone using revised waste weight. The loads on the ratchet binders hhve been recalculated along with the 1 stresses in the ratchet binder lugs on the primary lid and cask. Recal-culated stress and strain.on spacer ring due to top corner drop. Results are tabulated in Table 3-3 and are satisfactory. [ 7. Section 3.2.6.6 - Loads developed in the ratchet binders as a result of a side drop have been recalculated using the revised waste weight, and results are satisfactory. i C. Requested Changes to Certificate of Compliance No. 71-9151 If is requested that the following changes be made in Certificate of Compli-ance Number 71-9151. Paragraph 1(b)~ " Revision No. 1" ~ Paragraph 5(a)(1) "Model Nos.: HN-100 Series 3 and HN-100 Series 3A"
r - 4 s Page 5 Paragraph 5(a)(2) "...the cask side wall consists of a 3/8 inch thick inner shell, a lead shell' having a nominal thickness of 1-3/4 inches, and a 7/8 inch thick outer-steel shell." "... nuts are.used to provide positive closure. The Model No. HN-100 Series 3 is constructed of A516,. Grade 70, carbon steel. The shell has a minimum yield. strength of. 49,000 psi and the tie-down lugs a minimum yield-strength of. 46,000 pounds. The Model No. HN-100 Series 3A is constructed . primarily of A36 carbon steel with A516, Grade 70 lif t lugs and ratchet binder lugs. The tie-down lugs are A311, Grade-1137 carbon' steel with a minimum yield of 85,000, psi. A plugged drain in the base and a stainless steel cavity sleeve is optionally provided.. Tie-down is accomplished by four tie-down lugs welded to the cask body.- There are four cask lif ting lugs, three lid lifting lugs,' and one shield plug lifting lug. The package gross l weight is approximately 53,005 pounds for the HN-100 Series 3 and 48,800 pounds for,the HN-100 Series 3A." 3 Paragraph 5(a)(3) "The Series 3 packaging is fabricated in accordance with Hittman Nuclear & Development Corporation Drawing Nos. : C001-5-9138, Rev. 6; C001-5-9139, Rev. 4; C001-5-9140, Rev. 4; C001-5-9141,'Rev. 2; C001-5-9141, Rev. 2; C001-5-9142, Rev. 1; C001-5-9143, Rev. 5 and C001-5-9144, Rev. 3." "The Series 3A packaging is fabricated in accordance with Hittman Nuclear & Development Corporation Drawing Nos. : STD-02-020, Rev. 1; STD-02-021, Rev. 1; STD-02-022,-Rev. 1; STD-02-023, Rev. 1; STD-02-024, Rev. 0; STD-02-025, Rev. 1; and STD-02-026, Rev. 0." Paragraph 5(b)(1) (1) Type and Form of Material Greater than Type A quantities of nonfissile radioactive material as process solids, either dewatered, solid or solidified meeting the requirements. for low specific activity material (10 CFR 71.4) including source and trans-uranic materials,. sealed in secondary containers. Contents may include exempt quantities of fissile material (10 CFR 71.9)." Paragraph 5(b)(2) " (2) Maximum Quantity of Material per Package Not to exceed a' decay heat generation of 5 watts, with the weight of the contents, secondary containers, and shoring not ' exceeding 19,205 pounds : for the HN-100 Series 3 and 14,000 pounds for the HN-100 Series 3A." i 4 i -=w vv v r-iv-r-vw+1w m-rv v v+---w-
o Page'6 Paragraph 6 " Shoring shall be placed between small secondary containers and the cask cavity to prevent movement during normal conditions of transport. Shoring is not required when containers or pallets designed to fit the cavity are used." Paragraph 8 " Prior to each shipment, the seal on the main cover and the seal on the shield plug cover, if opened, or if the security seal is broken, must be inspected. The seals must be replaced if the inspection shows any visable defects or every twelve (12) months, whichever occurs first." +}}