ML20210E711

Rev 1 to Procedure Cnsi 9151-51, Suppl to Docket 71-9151 for Chem-Nuclear Sys,Inc,Cnsi 14-170 Series III Type a Radwaste Shipping Cask (USA/9151/A). W/Seven Oversize Drawings

ML20210E711
Person / Time
Site:	07109151
Issue date:	05/30/1986
From:	CHEM-NUCLEAR SYSTEMS, INC.
To:
Shared Package
ML20210E683	List: ML20210E678 ML20210E711
References
CNSI-9151-51, NUDOCS 8609250078
Download: ML20210E711 (26)

Text

{{#Wiki_filter:,. SUPPLEMENT TO DOCKET NO. 71-9151 FOR CHEM-NUCLEAR SYSTEMS, INC. CNS 14-170 SERIES III TYPE A RADWASTE SHIPPING CASK (USA /9151/A) CNSI Document No. CNSI 9151-S1 Revision No. 1 Date: May 30,1986 n C I

r Revision 1 Sept.1986 TABLE OF CONTENTS PAGE NO. 1.0 General Information 2 1.1 Introduction 2 1.2 Applicability 2 1.3 Package Description 2

2. 0 Chem-Nuclear Systems, Inc. "As Built" Drawings 3

3.0 Operating Procedures 3 3.1 Loading Procedure 3 3.2 Unloading Procedure 5

3. 3 Processing Liners Inside Cask 6

4.0 Acceptance Test and Maintenance Program 7 4.1 Initial Acceptance Test 7 4.1.1 Visual Inspection 7 4.1. 2 Lifting Lug. Load Test and Nondestructive Examination 7 4.1. 3 Test for Shielding Integrity (Gamma Scan) 8 4.1. 4 Test for Seal Integrity (Leak Test) 8

4. 2 Maintenance Program 8

4. 2.1 Painted Surface 8

4.2.2 Structural Members and Welds 9 4.2.3 Gaskets and Test for Seal Integrity (Leak Test) 10 4.2.4 Fasteners 10 4.2.5 Ratchet Binders 10 5.0 Quality Assurance 11 i 1 I

Revision 1 Sept.1986 1.0 GENERAL INFORMATION 1.1 Introduction The purpose of this supplement to Docket No. 71-9151 is to provide handling, maintenance and initial package acceptance information specific to the model CNS 14-170 Series III Cask licensed by the US Nuclear Regulatory Comission (NRC) and owned / operated by Chem-Nuclear Systems, Inc. The Supplement articulated herein provides the necessary guidance for compliance with the applicable requirements of Code of Federal Regulations, Title 10,. Part 71 (10CFR71). 1.2 Applicability This supplement is applicable only to CNS 14-170 Series III Casks licensed by the NRC under Certificate of Compliance No. 9151 and owned / operated by the Chem-Nuclear Systems, Inc. 1.3 Package Description Steel encased, lead shielded casks for low specific activity material. The casks are right circular cylinders 81-1/2 inches high by 81-1/2 inches in diameter. The cask cavities are 73-3/8 inches high by 75-1/2 inches in diameter. The cask side walls consists of a 3/8-inch thick inner steel shell, a 1-3/4 inch-lead shell, and a 7/8-inch thick outer steel shell. The base is comprised of two, 2-inch thick steel plates welded together to form a 4-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 steel shells of the side wall at the top. The lid is comprised of two, 2-inch thick steel plates, 'which are stepped and welded together to mate with the steel fl ange. The cask closure is sealed by a Neoprene gasket located between the lid and steel flange, positive closure of the lid is accomplished by eight, 1-3/4 inch ratchet binders. The lid contains a centrally located shield plug comprised of i two, 2-inch thick steel plates and one,1-inch thick steel plate i stepped and welded. The shield plug is sealed by a Neoprene gasket, and eight, 3/4-inch studs and nuts are used to provide positive closure. The packagings are constructed of A-516, Grade 70, carbon steel. The outer shell has a minimum yield i strength of 46,000 psi. Tie-down is accomplished by four tie-down lugs welded to the cask body. There are four cask i lifting lugs, three lid lifting lugs, and one shield plug l If fting lug. The package gross weight is approximately 53,000 pounds. l 2

(; Revision 1 Sept.1986

2. 0 CHEM-NUCLEAR SYSTEMS, INC. "AS-BUILT" DRAWINGS 2.1 The CNS 14-170 Series III Cask (s) are fabricated in accordance with the following Drawings:

2.1.1 Drawing No. C-110-D-0016, Revision C. 2.1. 2 Drawing No. C-110-D-0017, Revision B. 2.1. 3 Drawing No. C-110-D-0018, Revision B. 2.1. 4 Drawing No. C-110-D-0019, Revision B. 2.2 The above listed drawings are attached to this supplement.

3. 0 OPERATING PROCEDURES This section describes the general procedures for preparation, loading, and unloading of the CNS 14-170 Series III 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 Loading Procedure for 55-Gallon Drums (or for Instaliation of pre-t1l led 11ners) 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 syneetrically 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 (s) and any shoring materials from cask cavity. 3.1. 6 Visually inspect cask cavity to verify integrity. Clean and inspect gasket sealing surfaces. NOTE: REMOVE ANY MATERIAL.0R MOISTURE FROM CASK CAYITY UNDER THE SUPERVISION OF QUALIFIED HEALTH PHYSICS PERSONNEL USING THE NECESSARY ' H. P. MONITORING AND RADIOLOGICAL HEALTH SAFETY PRECAUTIONS AND SAFEGUARDS. ~ 3.1. 7 Load each 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 conter to the pallet. 3

Revision 1 Sept.1986 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 cavity walls to prevent movement during transport. 3.1.10 Repeat the loading procedure for the next layer of palletized drums. NOTE: FOR PRE-FILLED LINERS, USE CRANE TO LOWER LINER INTO CASK CAVITY. USE CAUTION TO PREVENT DAMAGE TO GASKET SEALING SURFACE OR INNER WALLS OF CASK CAVITY. 3.1.11 Lift the primary lid onto cask and position using the alignment ) ins and the alignment marks painted on cask body and l'd. 3.1.12 Replace the lid ratchet binders and tighten to 175-200 ft.-lbs. torque. Return the handles to their storage position. 3.1.13 Install anti-tamper seal wires on cask lid or ratchet binders. 3.1.14 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. B. Cask external removable contgmination is ALARA and does got exceed 22 dpm/cm beta-gamma and

2. 2 dpm/cm alpha in accordance with 10 CFR 71.87 and 49 CFR 173.443.

C. That trafier placarding and cask labeling meet DOT specifications 49 CFR part 172. 3.1.15 Install cask rain cover (if required) and secure to cask. 4

Revision 1 Sept.1986 3.2 Unloading Procedure NOTE: UPON RECEIPT OF CASK, PERFORM SURVEY FOR DIRECT RADIATION AND REMOYABLE CONTAMINATION USING APPROVED PROCEDURES TO ASSURE COMPLIANCE WITH 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 symmetrically located primary lid lifting lugs, lift the primary lid. 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 (s) and remove from cask cavity. 3.2.7 Visually inspect cask cavity to verify integrity. Clean and inspect gasket sealing surfaces. NOTE: REMOVE ANY MATERIALS OR MOISTURE FROM CASK CAVITY UNDER THE SUPERVISION OF QUALIFIED HEALTH PHYSICS PERSONNEL ~ USING THE NECESSARY H. P. MONITORING AND RADIOLOGICAL HEALTH SAFETY PRECAUTIONS AND SAFEGUARDS. 3.2.8 Install new liner or drum pallet (s) in cask, NOTE: IF LINER OR DRUMS CONTAIN MATERIALS THAT COULD PRODUCE HYDROGEN GAS AS DESCRIBED IN THE CERTIFICATE OF COMPLIANCE, ASSURE PROPER VENTING OR OTHER PROTECTIVE MEASURES ARE TAKEN. 3.2.9 Lift the primary lid onto cask and position using alignment pins and the alignment marks pointed in the cask body and lid. 3.2.10 Replace the lid ratchet binders and tighten to 175-200 ft.-lbs, torque. Return the handles to their storage posi tion. 3.2.11 If CNSI seal is broken on secondary lid, remove lid and check integrity of gasket. Reinstall lid and torque nuts to 120 + 10 ft.-lbs., using a star pattern. l 5

r-Revision 1 Sept.1986 3.2.12 Install ~ anti-tamper seals on primary and secondary lids. 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. 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 potentially contaminated. 3.3.6 Inspect and clean gasket sealing surfaces. 3.3.7 Proceed with filling the liner following appropriate personnel precautions and operational procedures. NOTE: PRIOR TO CLOSING THE LINER LID AND CASK, ASSURE TEN DAY VENT PERIOD CAN BE MET PRIOR TO SHIPPING THE CASK. (SEE HYDROGEN GENERATION CONDITIONS OF CERTIFICATE OF COMPLIANCE.) 3.3.8 Li ft the secondary lid onto the primary lid and position using indicated alignment marks and alignment pins. l 3.3.9 Replace the eight (8) hex nuts and torque to 120 + 10 i. ft.-lbs., using a star pattern. 3.3.10 Ensure primary lid ratchet binders are tightened to 175-200 ft.-lbs. torque and their handles are returned { to the storage position. 3.3.11 Install anti-tamper seal on primary and secondary lids. l 4 h 6 t

r-Revision 1 Sept.1986 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 and 49 CFR 173.441. B. Cask external removable contamination is ALARA and does got exceed 22 _dpm/cm2 beta-gamma and

2. 2 dpm/cm' alpha in accordance with 10 CFR 71.87 and 49 CFR 173.443.

C. That trailer placarding and cask labeling meet DOT specifications 49 CFR Part 172. 3.3.13 Install cask rain cover (if required) and secure to cask. 3.3.14 Check the cavity drain line to determine that the drain plug is properly installed using a pipe thread sealant. 4.0 ACCEPTANCE TEST AND MAINTENANCE PROGRAM 4.1 Initial Acceptance 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 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 drawing, speci fications, applicable codes and other pertinent data indicating qualitative and quantitative acceptable cri teria. All visual inspection shall be carried out either directly or remotely as described hereafter. The following shall be inspected: surface condi tion, dimension, finishes, shape, locations, details, size of holes, cleanlines, etc. 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-NuclNr 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. After the load tes t, all welding on the lugs will be examined by magnetic particle testing using the procedure approved by Chem-Nucl ear

Systems, Inc.

and performed by 7

Revision 1 Sept.1986 qualified 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 included to Quality Assurance Records of the cask. 4.1. 3 Test for Shielding Integrity shall be performed after the lead : pouring operations. A Gamma Scan shall be applied to verify lead thickness, shielding capacity and to determine existence of any voids or impurities in the poured lead. The Gamma Scan procedure shall specify an acceptance criteria for verification that the lead thickness is not less than 1-3/4 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 Gama Scan - shall be performed by qualified personnel in accordance wi th 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. 4.1. 4 Test for Seal Integrity shall also be performed prior to first use of the cask. A Leak Test shall be applied to the cask to assure leak tightness of the seals. The cask shall be pneumatically pressurized to 8 psi and while under pressure, seals are soap bubble checked for leakage acceptance criteria - no visible bubbles. Test Report shall be documented and included in the Quality Assurance Records of the cask. 4.2 Maintenance Program The Chem-Nuclear Systems, Inc. maintenance requirements for the CNS 14-170 Series III 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 cl eaned by steam or pressurized hot water using standard commercial i equipment, chemical solutions, and procedures, i 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 pain ts. i i 8

~ " Revision 1 Sept.1986 C. Alignment stripes shall be repainted when they are chipped, peeled off, faded, or not legible. Only localized surface preparation (sanding and cleaning) is require.1 prior to repainting of alignment stripes. 4.2.2 Structural Members 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 be performed as follows: Drop or Accident All accessible structrual

menbers, welds,

ratchet

binders, shall be visually inspected.

In

addition, all accessible welds must be magnetic particle tested.

The Magnetic Particle Test shall be performed by qualified personnel using a Chem-Nuclear

Systems, Inc.

approved procedure. Magnetic Particle Test shall meet the requirements of ASME 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 acceptance criteria. Test reports shall be documented and incl uded in the Quality Assurance Records of the cask. Improper 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 tested. Load and Magnetic Particle Test shall be performed in the same manner as delineated in the above paragraphs. B. Whenever the cask requires total repainting and is sanslasted, all structural members and welds shall be visually inspected for any indications. Suspect members and wel ds shall be magnetic particle tested. Magnetic Particle Test shall be performed in the same manner as delineated in the above paragraphs. C. Weld repairs if any shall be performed by qualified personnel using Chem-Nuclear Systems, Inc. approved procedures. Welding shall meet the requirements of ASME Code Section IX and/or MS D1.1. 9

e Revision 1 Sept.1986 4.2.3 Gaskets and Test for Seal Integrity (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. D. Any painted surfaces in contact with the gaskets shall be maintained in good condition. Any paint surface defect shall be properly retouched or repaired per paragraph 4.2.1.B. E Tests for seal integrity shall be performed after the annual replacement of all gaskets as a minimum. A Leak Test shall be performed in the same manner as delineated in above paragraph 4.1.4. 4.2.4 Fasteners A. All fasteners shall be inspected for damage after each use. Fasteners shall be replaced if the following conditions exist: Deformed or stripped threads. Cracked or deformed hexs on bolt heads or nuts. Elongated or scored grip length area on bolts or studs. Severe rusting or corrosion pitting. B. Fasteners shall be inspected for clean 11nes and presence 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 condition prior to use. 10

Revision 1 . Sept. 1986 B. Lubrication is required very infrequently and can be achieved by disassedly 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. 5.0-QUALITY ASSURANCE 5.1 On Deceder 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 re-approved on September 6,1983, and January 23, 1985. Under this certificate, the continued use of the program is authorized. 5.2 The Licen~ sed CNS 14-170 Series III Casks owned by Chem-Nuclear. Systems, Inc. which are certified under the provisions of 10 CFR 71 and built after January 1979 are designed, fabricated,

assedled, tested, modi fied, maintained and repaired in accordance with a Nuclear Regulatory Commission approved Quality Assurance Program (Docket #71-0231).

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