ML19210B747
| ML19210B747 | |
| Person / Time | |
|---|---|
| Site: | 07105980 |
| Issue date: | 10/08/1979 |
| From: | Cunningham G GENERAL ELECTRIC CO. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 14383, NUDOCS 7911120240 | |
| Download: ML19210B747 (16) | |
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.3 p.,iC NUCLEAR ENCRGY 3.dg ; J.4.
gj g 22: v1Al ENGINEERING GENERAL ELECTRIC COMPANY. P.O. BOX 460. PLEAsANTON, CALIFORNIA 94566 DIVISION October 8. 1979 4
7:
i Mr. Charles E. MacDonald, Chief 3
Transportation Branch i,
Officer of Nuclear Material Safety and Safeguards J
U.S. Nuclear Regulatory Commission r[
Washington, D.C.
20555 I
m Ref:
Certificate of Comoliance No. 5980
Dear Mr. MacDonald:
The General Electric Co., Vallecitos Nuclear Center (VNC), has for several years made shipments of radioactive materials in the G.E. Model 600 ship-ping container. Over this period a number of changes have been made in the drawings for this container.
Most of them have been minor, either editorial in nature (e.g. changes in drawing titles) or reflect the "as built" characteristics of the container system.
None of the changes have negative safety significance. Accordingly, VNC is submitting copies of the updated versions of the drawings listed in Certificate of Compliance 5980.
In addition, as Attachment A to this letter there is a listing of each revision to these drawings with explanations, where appropriate, demonstrating their lack of negative safety significance.
The. afore, VNC requests that Section 5.(a)(3) of the Certificate be amended to i?ad:
5.(a)(3) Drawings The packaging is constructed in accordance with the following General Electric J~. Drawings Nos:
212E247 Rev. 5; 10603898 Rev. 3; 144F650 Rev.1; 691C293 Rev. 3; 161F470 Rev. 2; 106D3892 Rev. 3; 12904865; 12904684; and 195F162.
Please note that one drawing, 211A7528, which describes the cask name plate has been deleted and three new drawings have been added.
As VNC has discontinued the use of water for the shielding of neutron sources in favor of a borated polyethylene shield, the second sentence, Section 5.(b)(2)(ii) should be amer.ded in part to read:
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Mr. Charles E. MacDonald October 8, 1979
..... from the surface of a package without internal shielding."
VNC also ce.,uests that Section 5.(b)(1)(i) be amended in part to read:
..... closure pretested for leak tightness.
Also, byproduct material and irradiated special nuclear material in special form."
Enclosed is a check in the amount of $2,800.00 for the amendment fee.
Sincerely,
$$f G.E. Cunning (am Sr. Licensing Engineer
/11 enclosures
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ATTACHMEffT A REVISIONS TO THE G. E. MODEL 600 DRAWINGS 4
ATTACHMENT A REVISIONS TO THE G.E. MODEL 600 DRAWINGS I.
DRAWING N0. 212E247 Rev. 3 Rev. 4: This revision shows the addition of the redundant lifting lugs and contains the details for the fabrication of the redundant lifting lugs. The cask with reddndant lifting lugs is used at reactor facilities where compliance with Regulatory Guide 1.104 is required. A copy of the structural analysis qualifying this addition is enclosed as Attachment B.
Rev. 5: The title of this drawing was changed to "Model 600 Ship-ping Cask" to make the Model 600 co.istent with other cask identifi cation. The next assembb drawing raference was up-dated to the present configuration drawing 106D3898, and a new closure seal drawing reference was added to document seal developments.
The tolerance was increased at the four lifting lug holes (P28) and a washer added to reflect the as-built assembly.
The seal wire was removed from the cask since the security sealing function has been transferred to the jacket.
The bolts were changed to ASTM A-193 Grade B6 to meet the requirements of proposed Regulatory Guide 1.104 for handling casks at reactor sites. The pipe plug description was gen-eralized to allow usage of fusible socket head plugs as re-quired by the current certificate.
A seal weld option was added to the lid eye, and a refer-ence to Basket 117B1034 was removed since it is outdated.
An option to install threaded plugs thruagh Parts 5, 6, and 12 was added to allow future thread repair.
II.
DRAWING NO. 106D3898 Rev. 1 Rev. 2: This revision added an illustration of the modification to the fireshield cask assembly base showing installation of four eacally spaced I-beams perpendicular to the existing beams to raise the cask for easier forklift handling.
Rev. 3: This last revision was made to update the current 600 package.
It changed the title to reflect the current identification as "Model 600 Transport Container" and also deleted the parts associated with the two horizontal shear bolts (P4, PS, and P6). This change makes the drawing consistent with G.E. submittal of January 13, 1969 (Amend-ment 3, Docket 71-5980). Tne two horizontal shear bolts were changed to eight vertic " attachment bolts as the results of discussions with commission personnel in 1969 to impecve the attachment of the jacket to the base. However, the drawing revisions eliminating the horizontal bolts dere never submitted.
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Attachment A Page two II.
DR/ WING NO. 106D3898 Rev. 1 (continued)
Rev.,,3_:
(continued)
Part 7, the internal wire seal was deleted and relocated to the horizontal hold-down hole.
A reference was added to indicate the requirement for a separate transport box for the two redundant ears and eight installation bolts.
Parts 12,13, and 14 were removed since their function is being replaced by the tie-down yoke, P15. The existing 12-ton shackles are shown in P16.
Two extraneous indications, "6 lead", were removed from assembly Gl. The additional jac:et lifting ears were included to increase handling veruatility. The nameplate drawing number was changed.
III.
DRAWING NO. 144F650 Rev. 1:
.'he title was updated to relfect the current liner designa-tion as Model 600. A reference to the top assembly drawing, 106D3898, was added. The old Bureau of Explosives permit number (1298) was removed along with the reference to avoid confusion with NRC certification.
The weight of the liner was corrected and broken down into lid and body weight.
IV.
DRAWING NO. 693C293 Rev. 2 Rev. 3: This revision changed the drawing title and the "first made for" reference from "100 Series" to "Model 100 Cask".
The reference to Drawing 212E236 was deleted.
V.
DRAWING N0.161F470 Rev.1 Rev. 2:
This revision changed the title to the current nomenclature "Model 600".
Detail F was modified to allow the jacket lifting ears to be used by our present fork truck.
Parts 35 and 36 were deleted since the new hold-down yoke replaces their function.
Specific painting details were referred to specification.
Parts 12,13, and 15 were made 6" wide to correct an inconsistency in the drawing.
Part 5 was made optional since horizontal hold-down bolts have been eliminated. Weld detail F was expanded to include Part 37 and an additional Part 15. An option was added to fabri-cate Parts 8, 24, 9, 25, 18, 19 and 27 from angle as well as welded plate to ease fabrication. Tolerances on tne jacket ears (Part 14) were increased to accommodate replace-ment shackle dimensions.
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Attachment A Page three VI.
DRAWING NO.106D3892 Rev.1 Rev. 2: This revision added four I-beams (Part 13) and 16 spacer blocks (Part 14) to elevate the base for improved forklift handling. The position of the fork block plate (part 12) was shifted by 9/16" and the length reduced from 41-1/2" to 40-3/8". This dimensional change increased the fork clear-ance by 9/16" on each side.
Rev. 3: This revision changed the drawing to reflect the "Model 600" designation.
Options were shown for the four tabs, Part 5, which hold the energy absorption plate, Part 2, to allow the installation by flat head bolts or tack welding and for a rotation of 45*.
These tabs are not an active part of energy absorption system and only provide retention of the plate when the cask is removed.
Part 5 has been made optional. Optional threaded holes were allowed in Part 2 to provide attachment points for removal of the part for decontamination, inspection, and/or repairs.
Specific painting details were referred to specification. The size designation on the energy absorbing angles, Parts 6, 7, and 8, was changed to allow the installation of 1-1/2" x l-1/2" x 1/8" or 1-1/4" x l-1/4" x 1/8" angle steel as options to the existing size. Crush tests indicate insig-nificant difference in energy absorption capability between these two sizes of steel angle. The 1/16" dimension was eliminated from the corner break on Part 11 to allow a larger break as required.
VII.
DR/ WING NO. 12904865 This drawing details an improved closure seal.
VIII.
DRAWING N0. 129D4684 This drawing describes a new tie-down yoke. The yoke was added to the package assembly as a multifunctional improvement to the tie down system.
't covers the jacket lifting ears in transit preventing their use as tie down devices.
It also serves as an improved upper tie down fixture.
IX.
DRAWING N0. 195F162 This is the fabrication drawing for a neutron scurce s!, eld. The shield is designed to eliminate the necessity of shipr ing neutron sources with water shielding.
Dose rate measurements demonstrated that the shield is as effective as the water for reducing radiation
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0 ATTACHMENT 8
SUMMARY
OF STRESS ANALYSIS REDUNDANT LIFTING EARS
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8 STRESS
SUMMARY
TAB g ASME CODE STRESS STRESS ALLOWABLE MARGIN LOCATION **
CATEGORY LEVEL -KSI STRESS -KSI wrt ALLOWABLE 1
P,
/3.65 22.50
- 39$
2 Bearing *
/[p,f,7-22.F; e24%
//.0$
22.50
- 5/T, 3
P,+Pb 4
P, 32.4 63.75 ry$
5 P,
/8. '/
63.75,
+7/$
6 P,
/2,S 22.50 t//3$
646 22.s0
+7/ $
7 P,+Pb 8
P,
@ 778 22.50 t573 3523 60.00
+4/3 8
- Assumed lifting hock diameter is 1.375 inches.
If smaller diameter hooks are used the bearing stress allowable wili be exceeded-
- Refer to next page for the identification of sturetural locations.
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GENERAL h ELECTRIC occtmINT No.
RCV. No.
NUCLEAR ENERGY DIVISION suuruc. 3 i
BENDING AND MEF3RANE STRESS I
3 AT TOP OF WELD PLATE BENDING 7
r 6
l i
MEMBRNIE STRESS 4
i
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STRIPPING S
SHEA8 CUT ALONG OF BOLT THREADS
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DOTTED LINES
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J l
2 BEARIid LTRESS STRIPPING J
OF TAPPED THREADS IIl!
BENDING AND MEMBRANE STRESS IN CYLINDER WALL N
STRUCTURAL LDCATIQlS CDNSIDERED IN THIS ANALYSIS.
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1CT33 1312 270