ML20195B656
| ML20195B656 | |
| Person / Time | |
|---|---|
| Site: | 07109080 |
| Issue date: | 10/21/1988 |
| From: | CHEM-NUCLEAR SYSTEMS, INC. |
| To: | |
| Shared Package | |
| ML20195B653 | List: |
| References | |
| CNSI-9080-S1, CNSI-9080-S1-R, CNSI-9080-S1-R00, NUDOCS 8811020128 | |
| Download: ML20195B656 (16) | |
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SUPPLEMENT TO DOCKET NO. 71-9080 o
FOR.
CHEM-NUCLEAR SYSTEMS, INC.
CNS 7-100 TYPE A PADHASTE SHIPPING CASK (USA /9080/A) o O
CNSI Document No. CNSI 9080-S1 Revision No.
0 Date: October 21. 1988_
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8811020128 PDR ADOCK 0710f080 C
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10/21/88 TABLE OF CONTENTS PAGE NO.
1.0 General Information 1
1.1 Introduction 1
1.2 Applicability 1
1.3 Package Description 1
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2.0 Chem-Nuclea
Systems, Inc. "As Built" Drawings 1
3.0 Operating Procedures 2
3.1 Loading Procedure 2
3.2 Unioading Procedure 3
i 3.3 Processing Liners Inside Cask 4
3.4 Removing and Reinstalling Cask On Trailer 6
4.0 Acceptance Test and Maintenance Program 6
l l
4.1 Initial Acceptance Test 6
l 4.1.1 Visual Inspection 5
4.1.2 Lifting Lug Load Test and Nondestructive Examination 6
4.1.3 Test for Shielding Integrity (Gamma Scan) 7 4.1.4 Test for Seal Integrity (Leak Test) 7 l
4.2 Maintenance Program 8
l 4.2.1 Painted Surface 7
4.2.2 Structural Members and Helds 8
4.2.3 Gaskets and Test for Seal Integrity (Leak Test) 9 4.2.4 Fasteners 9
4.2.5 Ratchet Binders 9
i 5.0 Quality Assurance 10 i
I w
Rev. 0 10/21/88 v
1.0 GENERAL INFORMATION 1.1 Introduction The purpose of this supplement to Docket No. 71-9080 is to provide handling, maintenance and initial package acceptance information specific to the model CNS 7-100 Cask licensed by the US Nuclear Regulatory Commission (NRC) and owned / operated by Chem-Nuclear Systems, Inc.
The Supplement articulated herein provides the necessary guidance for compliance with the applicabla requirements of Code of Federal Regulations. Title 10, Part 71 (10CFR71).
1.2 Acolicability This supplement is applicable only to CNS 7-100 Casks licensed by the NRC under Certificate of Compliance No.
9080 and owned / operated by the Chem-Nuclear Systems Inc.
1.3 Package Descriotion Steel encased, lead shielded casks for low specific activity material.
The casks are right circular cylinders 54-1/2 inches high by 84 inches in diameter.
Each cask has a cavity which is O
40-3/4 inches high by 75-1/2 inches in diameter.
The task side wall consists of a 3/8-inch thick inner steel shell, a 3-inch lead shell, and a M4-inch thick outer steel shell.
The base is comprised of two steel plates welded together to form a 5-1/2-inch thick base which is integrally welded to the inner and outer steel shells of the side wall.
A steel flange is welded to the inner and outer shells of the side wall at the top.
The 5-1/2-inch thick lid is comprised of two steel plates welded together, which are stepped to mate with the steel flange.
The cask closure is sealed by a Neoprene gasket located between the lid and steel flange.
Positive closure is accomplished by eight ratchet binders.
The lid contains a 6-1/2-inch thick centrally located secondary lid comprised of three steel plates stepped and welded.
The secondary lid is sealed by a Neoprene gasket, anJ eight 3/4-inch bolts are used to provide positive closure.
The cask has a plugged drain line in the base of the cask and a stainless steel lined cavity.
Tie-down is accomplished by four tie-down lugs welded to each cask body.
Etch cask is provided with four lif ting lugs, three lid lifting lugs, and three shield plug lif ting lugs.
The cask gross weight is approximataly 48,000 pounds.
2.0 CliEH-MCLEAR SYSTIHL INC. "AS BUILl"_DReBUiGS A
2.1 The CNS 7-100 Cask (s) are fabricated in accordance with CNSI U
Orawing No. C-110-0-5000, Rev.
, Sheets 1 and 2.
2.2 The above listed drawing is attached to this supplement.
1 (0007H)
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Rev. 0 10/21/88 C/
3.0 OPERATING PROCEDURES This section describes the general procedures for preparation, loading, and unloading of the CNS 7-100 Cask.
Detailed procedures developed, reviewed, and approved in accordance with the requirements of the CNSI Quality Assurance Program are issued to authorized users.
3.1 Loadina Procedure for 55-Gallon Drumi (or for installation of pre-filled liners) 3.1.1 Remove cask rain cover, if installed.
3.1.2 Loosen and disconnect ratchet binders from cask lid.
3.1.3 Using a
lifting sling attached to the three symmetrically located primary lid lifting lugs, lift the primary lid.
3.1.4 Lay down lid on a suitable protected surface, treating lid underside as potentially contaminated.
3.1.5 Using crane and suitable rigging, remove pallet and any shoring materials from cask cavity.
O 3i5 visu iiv ' aspect ce>x cevits to verity
$ ate 9ritv-Clean and inspect gasket sealing surfaces.
NOTE:
REMAVE ANY HATERIAL OR H01STURE FROM CASK CAM 7Y UNDER THE SUPERVISION OF QUALIFIED HEALTH PHYSICS PERSONNEL USING THE NECESSARY H.P.
HONITORING AND RADIOLOGICAL HEALTH SAFETY PRECAUTIONS AND SAFEGUARDS.
3.1.7 Load the pallet with a maximum of seven (7) 55-gallon drums.
Shielding effectiveness may be optimized by placing drums with highest surface dose rate near the center of the pallet.
NOTE:
IF LINER OR DRUHS CONTAIN HATERIALS THAT COULD PRODUCE HYDROGEN GAS AS DESCRIBED IN THE CERTIFICATE OF COMPLIANCE, ASSURE PROPER VENTING OR OTHER PROTECTIVE HEASURES ARE iAKEN.
3.1.8 Attach crane to the lifting ring on the pallet slings and carefully lower into cask cavity, use caution to prevent damage to gasket sealing surfaces in inner walls of cask cavity, 3.1.9 Place shoring where appropriate between drums and cask n) cavity walls to prevent movement during transport,
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(0007H) 1
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Rev. 0 10/21/88 NOTE:
' PRE-FILLED LINERS, USE CRANE TO LOHER INTO CASK CAVITY.
USE CAUTION TO T DAMAGE TO GASKET SEALING SURFACE OR HALLS OF CASK CAVITY.
3.1.10 Lift the primary lid onto cask and position using the j
alignment ains and the alignment marks painted on cask l.
body and lad.
3.1.11 Replace the lid ratchet binders and tighten to 100 i 10 ft.-Ibs torque.
Return the hardles to their storage position.
I 3.1.12 Install anti-tamper seal wires on cask lid or ratchet binders.
3.1.13 Perform cask survey and verify that the following requirements are satisfied:
A.
Cask external radiation levels do not exceed 200 mR/ hour on contact,10mR/ hour at 2 meters, and 2 mR/ hour in the tractor cab in accordance with 10 CFR 71.47 and 49 CFR 173.441.
O c>>x exter">i ra=ovedie coats i">tio" i' ^'^a^
>#d 8-does not exceed 22 dpm/cm beta-gamma and 2.2 dpm/cm2 alpha in accordance with 10 CFR 71.87 and 49 CFR 173.443.
C.
That trailer placarding and cask labeling meet 00T specifications 49 CFR part 172.
3.1.14 Install cask rain cover (if required) and secure to cask.
3.1.15 Check cavity drain line to determine that the drain plug is properly installed using a pipe thread sealant.
3.2 Unicadina Procedgrjt NOTE:
UPON RECEIPT OF CASK, PERFORM SURVEY FOR DIRECT RADIATION AND REHOVABLE CONTAMINATION USING APPROVED PROCEDURES TO ASSURE COMPLIANCE HITH APPLICABLE REQUIREMENTS OF 10 CFR 20.205.
3.2.1 Remove cask rain cover, if installed.
3.2.2 Loosen and disconnect ratchet binders from cask lid.
3.2.3 Using a
lifting sling attached to the three O
symmetrically located primary lid Ilfting lugs, lift the prima 1y lid.
3 (0007H)
r Rev. 0 10/21/88 n
3.2.4 Inspect and verify integrity of lid gasket.
3.2.5 Lay down lid on a suitable protected surface, treating lid underside as potentially contaminated.
3.2.6 After survey by Health Physics personnel, attach crane to liner or drum pallet and remove from cask cavity.
3.2.7 Visually inspect cask cavity to verify integrity.
Clean and inspect gasket sealing surfaces.
NOTE:
xEHOVE ANY MATERIALS OR H0!STURE FROH CASK CAVITY UNDER THE SUPERVISION OF QUALIFIED HEALTH PHYSICS PERSONNEL USING THE NECESSARY H.P.
HONITORING AND RADIOLOGICAL HEALTH SAFETY PRECAUTIONS AND SAFEGUARDS.
3.2.8 Install new liner or drum pallet in cask.
NOTE:
IF LINER OR DRUMS CONTAIN PATERIALS THAT COULD PRODUCE HYDROGEN GAS AS DESCRIBED IN THE CERTIFICATE OF COMPLIANCE ASSURE PROPER VENTING OR OTHER PROTECTIVE HEASURES ARE TAKEN.
O 3.2.9 Lift the primary lid onto cask and position using alignment pins and the alignment marks painted on the cask body and lid.
3.2.10 Replace the lid ratchet binders and tighten to 100 i 10 f t.-Ibs torque.
Return the handles to their storage position.
3.2.11 If CNSI seal is broken on secondary lid, remove lid and check integrity of gasket.
Reinstall lid and torque bolts to a lubricated value of 5015 ft.-lbs., using a star pattern.
3.2.12 Install anti-tamper seals on primary and secondary lib.
l 3.2.13 Prior to departure from site, ensure that exterior radiation levels (fixed and removable) are below site release and applicable Federal limits.
3.2.14 Ensure proper placarding of cask and trailer.
3.3 Processing Liners Inside_ Cask (for empty liners pre-installed in cask cavity) 3.3.1 Remove cask rain cover, if installed.
3.3.2 Loosen and remove the eight (8) nuts that secure the secondary lid.
4 (0007H)
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Rev. 0 10/21/88
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I 3.3.3 Attach a lifting sling to the lifting lug on the secondary lid, and lift off lid.
3.3.4 Inspect and verify integrity of gasket.
3.3.5 Lay down lid on a suitable protected surface, treating lid underside as poten'.ially contaminated.
3.3.6 Inspect and clean gasket sealing surfaces.
3.3.7 Proceed with filling the liner following appropriate personnel piecautions and operational procedures.
NOTE:
PRIOR TO CLOSING THE LINER LID AND CASK, ASSURE TEN OAY VENT PERIOD CAN BE HET PRIOR TO SHIPPING THE CASK.
(SEE HYOROGEN GENERATION CONDITIONS OF CERTIFICATE OF COMPLIANCE.)
3.3.8 Lift the secundary lid onto the primary lid and position using indicated alignment marks and alignment pins.
3.3.9 Replace the eight (8) hex nuts and torque to a pg lubricated value of 50 1 5 ft.-lbs., using a star pattern.
3.3.10 Ensure primary lid ratchet binders are tightened to 100 10 f t.-lbs torque and their handles are returned to the storage position.
3.3.11 Install anti-tamper seal on primary and secondary lids.
3.3.12 Perform cask survey and verify that the following requirements are satisfied:
A.
Cask external radiation levels do not exceed 200 mR/ hour on contact.10 mR/ hour at 2 meters, and 2 mR/ hour in the tractor cab in accordance with 10 CFR 71.47 Md 49 CFR 173.441.
B.
Cask external removable contamination is ALARA and does not exceed 22 dpm/cm2 beta-gamma and 2.2 dpm/cm2 alpha in accordance with 'O CFR 71.87 and 49 CFR 173.443.
l C.
That trailer placarding and cask labeling meet 00T specifications 49 CFR Part 172.
3.3.13 Install cask rain cover (if required) and secure to O
cask.
5 (0007H)
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Rev. 0 10/21/88
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3.3.14 Check the cavity drain line to determine that the drain plug is properly installed using a pipe thread sealant.
3.4 Removina and Reinstallino Cask On Trailer If it is necessary to remove cask from er return cask to trailer, use the following procedures:
Removal 1.
Loosen and remove cask tie-down cables.
2.
Mark cask position and orientation on trailer.
3.
Verify cask lids are in place and ratchet binders and lid bolts are torqued.
Secondary lid bolts torqued 50 15 f t-lbs, lubricated, in a star pattern.
Primary lid ratchet binders torqued to 100 1 10 ft-lbs with handles secured in storage position.
4.
Using lif t equipment rated for no less than 24 ton safe working load, lif t the cask by the four lifting lugs provided.
[]
Reinsta11ation 1.
Verify cask lids are in place and ratchet binders and lid bolts are torqued.
Secondary lid bolts torqued 50 15 ft-lbs, lubricated, in a star pattern.
Primary lid ratchet binders torqued to 100 1 10 ft-lbs with handles secured in storage position.
2.
Using lift equipment rated for no less than 24 ton safe working load, lif t the cask by the four lifting lugs provided.
3.
Position cask on trailer using alignment marks made when removing cask from trailer.
4.
Remove lifting equipment from cask.
5.
Replace cask tie-down cables and tighten.
4.0 ACCEPJMCE_IEST AND MAINTENANCE _fRQGEM 4.1 Initial AcceAtlace Test During and after fabrication of the cask, various tests and inspections are required prior to the first use of the cask.
The tests and inspections required to be performed are
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enumerated below-4.1.1 Visual inspection and dimensional verification of the entire cask and its accessories shall be performed to verify compliance with the requirements of appropriate 6
- 5.,
Rev. 0 10/21/88
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- drawing, specifications, applicable codes and other pertinent data-indicating qualitative and quantitative acceptable criteria. -All visual inspection shall be carried out either directly or remotely as described hereafter. The following shall be inspected:
surface condition, dimension,
- finishes, shape, locations, details, size of holes, cleanliness, etc.
Packaging fabricated after August 31, 1980 will be constructed of A-516 Grade 70 carbon steel instead of A-36 carbon steel.
4.1.2 Lifting Lugs Load Test shall. also be performed.
The Load Test of all lifting lugs shall be performed in accordance with a procedure approved by Chem-Nuclear
~
Systems, Inc.
Each lug shall be load tested to one and a half times the calculated load capacity of the lug and held ten minutes as a minimum.
Before and after tne load test, all welding on the lugs will be examined by magnetic particle testing using the procedure approved by Chem-Nuclear Systems, Inc. and performed by quallfled personnel.
Magnetic Particle Test shall meet the requirements of ASME Code Section
- III, Division I Subsection NB, Article NB-5000 and Section V, Article 7.
Test Reports shall be documented and O
included to Qu lity Assurance Records of the cask.
4.1.3 Test for Shielding Integrity shall be performed after the lead pouring operations.
A Gama Scan shall be applied to verify lead thickness, shielding capacity and to etermine existence of any volds or impurities in the pourad lead.
The Gamma Scan proceduto shall specify an acceptase criteria for verification that the lead thickness ti not less than 3 inches.
The Gamma Scan must show no greater than ten percent loss of shielding at any point based on a four inch grid spacing.
The Gamma Scan shall be performed by qualified personnel in accordance with a procedure
(
approved by Chem-Nuclear Systems, Inc.
Results of the Gamma Scan shall be documented and included in the Quality Assurance Records of the cask.
l 4.1.4 Test for Seal Integrity shall also be performed prior I
to first use of the cask. A leak Test shall be applied to the cask to assure leak tightness of the seals.
The i
cask shall be pneumatically pressurized to 8 psi and while under pressure, seals are soap bubble checked for l
1eakage acceptance criteria - no visible bubbles.
Test Report shall be documented and included in the Quality Assurance Records of the cask.
O 7
(0007H)
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r.
Rev. 0 10/21/88 v
4.2 Maintenance Proaram The Chem-Nuclear Systems, Inc. maintenance requirements for the CNS 7-100 Cask are articulated in this section.
These requirements reflect the specific operating conditions, limitations and regulatory requirements.
4.2.1 Painted Surfaces A.
Painted surfaces shall be cleaned by steam or pressurized hot water using standard commercial equipment, chemical solutions, and procedures.
There are no special precautions required in this cleaning operation.
B.
Chipped or scratched surfaces shall be retouched or repainted using Chem-Nuclear Systems, Inc. approved paints.
C.
Alignment stripes shall be repainted when they are chipped, peeled off, faded, or not legible.
Only localized surface preparation (sanding and cleaning' is required prior to repainting of alignment stripes.
4.?.2 Structural Hembers and Welds A.
All structural members and welds shall have been checked prior to initial use of the cask.
Inspections of structural members and welds are not required during routine use unless the cask has been involved in an accident or has been lifted improperly or in an overload condition.
In those cases, inspection must bc performed as follows:
0100 or Accident - All accessible structural
- members, welds, ratchet
- binders, shall be visually inspected.
In
- addition, all accessible welds must be magnetic particle tested.
The Hagnetic Particle Test shall be performed by qualified personnel using a
Chem-Nuclear
- Systems, Inc.
approved procedure.
Hagnetic Particle Test shall meet j
the requirements of ASHE Code.Section III.
Division 1 Subsection NB, Article NB-5000 and Section V. Article 7.
The Gamma Scan must be repeated and evaluated to the initial acceptince criteria.
Test reports shall be documented and included in the Quality Assurance Records of the cask.
8 l
(0007H)
.e.
Rev. 0 10/21/88 Imoroner or Overload lift - All welds on the primary or secondary lid which were used during the time of improper or overload lift shall be load tested and magnetic particle j
tested.
Load and Hagnetic Particle Test shall be performed in the same manner as delineated in the above paragraphs.
8.
Whenever the cask requires total repainting and is I
sandblasted, all structural members and welds shall be visually inspected for any indications.
Suspect l
members and welds shall be magnetic particle tested.
Magnetic Particle Test shall be performed in the same manner as delineated in the above paragraphs.
C.
Held repairs if any shall be performed by qualified personnel using Chem-Nuclear Systems, Inc. approved procedures.
Helding shall meet the requirements of ASHE Code Section IX and/or AHS D1.1.
4.2.3 Gaskets and Test for Seal Integr'ity (Leak Test)
A.
All Gaskets shall be inspected for proper installation prior to each cask loading.
B All Gaskets shall be replaced once a year as a minimum regardless of condition.
C.
Gaskets which cannot be sealed or are damaged must be replaced or repaired.
Damages may include cuts, nicks, chips, indentations, or any other defects apparent to the naked eye which would affect sealing functions.
l 0.
Any painted surfaces in contact with the gaskets shall be maintained in good condition.
Any paint f
surface defect shall be properly retouched or
(
repaired per paragraph 4.2.1.8.
j E
Tests for seal integrity shall be performed after
[
the annual replacement of all gaskets as a
l minimum.
A Leak Test shall be performed in the l
1 same manner as delineated in above paragraph 4.1.4.
4.2.4 Fasteners l
A.
All fasteners shall be inspected for damage after each use.
Fasteners shall be replaced if the following conditions exist:
Deformed or stripped threads.
r 9
(0007H) l
F s.
Rev. 0 10/21/88 g
Cracked or defortred hexs on bolt heads or nuts.
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Elongated or scored grip length area on bolts or studs.
Severe rusting or corrosion pitting.
B.
Fastaners shall be inspected for cleanliness and prex 'ce of lubricant in the threads prior to use.
Any fastener found dirty shall be cleaned and relubricated.
4.2.5 Ratchet Binders A.
The ratchet binders are designed for long rugged use with minimal maintenance.
All ratchet binders shall be inspected for operation and general rondition prior to use.
B.
Lubrication is required very infrequently and can be achieved by disassembly of the binder and lubricating the threads.
A good indication for the need to lubricate the ratchet binder will be dry threads on the joining bolt or hard operation.
U)
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5.0 00ALITY ASSURANCE 5.1 On December 21, 1978 Chem-Nuclear Systems, Inc. filed with the NRC a description if its Quality Assurance Program in accordance with 10 CFR 71.51(a).
The Chem-Nuclear Systems, Inc. Quality Assurance Program was initially approved by the NRC on October 26, 1979 and Approval Certificate No. 0231 was issued.
The Chem-Nuclear
- Systems, Inc.
Quality Assurance Program was subsequently reapproved on Stptember 6, 1983, and January 23, 1985.
Under this certificate, the continued use of the program is authorized.
5.2 The Licensed CNS 7-100 Casks owned by Chem-Nuclear Systems, Inc.
which are certified under the provisions of 10 CFR 71 and built af ter January 1979 are designed, fabricated, assembled, tested, modified, maintained and repaired in accordance with a Nuclear Regulatory Commission approved Quality Assurance Program (Occket
- 71-0231).
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