ML19114A293
| ML19114A293 | |
| Person / Time | |
|---|---|
| Site: | 07103052 |
| Issue date: | 03/05/2019 |
| From: | Willems T TN Americas LLC, Orano USA |
| To: | Division of Spent Fuel Management |
| Shared Package | |
| ML19115A128 | List:
|
| References | |
| Download: ML19114A293 (12) | |
Text
Formulaire : PM04-4-MO-6E rév. 02 Orano TN SAFETY ANALYSIS REPORT NON PROPRIETARY VERSION CHAPTER 00 TN MTR Prepared by T.WILLEMS Date Signature Identification :
DOS-18-011415-001 NPV Vers. 2.0 Page 1 / 12 NON PROPRIETARY VERSION INTRODUCTION TABLE OF CONTENTS
- 1.
GENERAL ABOUT THE TN-MTR PACKAGING
- 2.
GENERAL CONTEXT
- 3.
PRESENTATION OF THE TN-MTR PACKAGING AND ITS CONTENT
- 4.
APPLICABLE CODES AND REGULATIONS LIST OF FIGURES
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 2 of 12 NON PROPRIETARY VERSION REVISION STATUS Revision Date MODIFICATIONS Prepared by /
Checked by Old reference: DOS-16-00173678-001 2
N/A Document first issue. Revision number intentionally set to correspond to the source document revision number.
TWI / APA New reference: DOS-18-011415-001 1.0 N/A New reference due to new document management system software.
TWI / APA 2.0 N/A Adding of the Caesium trap content and Gisete content SAZ / TWI
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 3 of 12 NON PROPRIETARY VERSION
- 1. GENERAL ABOUT THE TN-MTR PACKAGING The TN-MTR packaging is designed to transport fuel or reflecting elements, irradiated or not, from research reactors, either with exclusive use or non-exclusive use, depending on the characteristics of the transported radioactive content.
The TN-MTR packaging is also used for the transport of sealed sources with special shape, placed in equipment such as radiological protection or not, held in place and wedged in the packaging cavity by special internal fittings.
The package composed of the TN-MTR packaging with its internal fittings and one of the radioactive contents described in chapters 0A and the associated appendices, complies with the requirements in the International Atomic Energy Agency rules applicable to B(U) type packages, and to packages containing fissile materials in the case of fuels obtained from research reactors.
The packaging is designed and sized to be compatible with installations and their handling means.
- 2. GENERAL CONTEXT The packaging is designed to transport fuel or reflecting elements, irradiated or not, from research reactors such as RHF, OSIRIS, ORPHEE, etc. It is also used to transport sealed sources with special shape. Non-exhaustive lists of fuel elements and other authorised contents are presented in appendices to chapters 0A in this file.
In addition to the fuel or reflecting elements mentioned above, all those satisfying the criteria in the "limiting characteristics of fuel elements" tables and one of the tables of radioactive contents in the appendixes to chapters 0A, are also authorised contents.
Because of the great diversity of contents transported, and in order to optimise the capacity of the package, several internal fittings or different baskets have been developed. Each of these internal fittings can be easily inserted into, or removed from, the packaging, and can be used in each of the TN-MTR type packagings.
The internal fittings developed are as follows:
Basket MTR-68: for small section MTR assemblies.
Basket RHF: for RHF assemblies; these MTR fuels are very different from the others and justify the development of a special basket.
Basket FRM-II: for FRM-II assemblies; these MTR fuels are very different from the others and justify the development of a special basket.
Baskets MTR-52, MTR-52S and MTR-52SV2: for medium section MTR assemblies.
Basket MTR-44: for small to medium section MTR assemblies.
CESOX packing: for a sealed source with special shape, transported in special shielding.
Caesium trap packing: for the transport of a caesium trap Gisete packing: for the transport of an isotope generator of type gisete 4, gisete 5 or gisete 8
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 4 of 12 NON PROPRIETARY VERSION The dimensions of acceptable sections are given in the tables in the appendices to chapters 0A.
The dimensions of the cavity in the packaging (diameter 960 mm and height 1 080 mm) are determined by the dimensions of the contents to be transported.
Thicknesses of lead layers are optimised as a function of the maximum allowable mass, the insulation is defined to prevent the lead layer from melting when the packaging is subjected to the thermal test while maintaining an acceptable cavity temperature.
The packaging is transported in the vertical position to facilitate handling operations.
It is tied down directly in the overpack or on the flat bed by straps and chocks, without a frame.
It is handled by two trunnions screwed onto the top of the packaging, located within the thickness of the shock absorbing cover. The shock absorbing cover is recessed at the location of each trunnion so that the packaging can be handled using the trunnions when the shock absorbing cover is in place.
There are no orifices positioned on the body, to optimise safety of the packaging; the two orifices are positioned on the lid and are protected by the shock absorbing cover.
The junction between the shell and the bottom is formed by a truncated cone, to reduce the mass and to minimise accelerations in the case of a bottom-down drop.
The shielding of the packaging is provided mainly by lead. The lead is surrounded by an insulating layer so that the lead will not melt in the case of a fire.
Fins are welded to the external shell of the packaging to facilitate heat exchanges.
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 5 of 12 NON PROPRIETARY VERSION
- 3. PRESENTATION OF THE TN-MTR PACKAGING AND ITS CONTENT A diagram of the TN-MTR packaging is given in Figure 00.1.
3.1 Presentation of the TN-MTR packaging The three main components of the packaging are the body, the lid and the shock absorbing cover.
The body is a cylinder with a solid bottom, composed of an inner shell and an outer shell made of stainless steel, a layer of lead and a layer of insulation. Fins are welded to the external shell of the packaging to respect surface temperature requirements.
The top part of the body is composed of a flange into which the lid fits. The two packaging trunnions are screwed onto this flange.
The tie-down lugs are welded to the outer shell.
The lid is:
- either a disk composed of a lead layer, surrounded by a metal casing. It is fixed to the body by screws. This lid is known as the "standard" type. This lid can be used regardless of the type of internal fitting containing one of its allowable contents placed in the TN-MTR packaging.
- or composed mainly of the following 3 components; the lid, the plug and the ring. The lid is fixed to the packaging body by screws. These 3 parts are manufactured from stainless steel. This lid is known as the "SEC" type. This lid can be used only when the TN-MTR packaging is fitted with an MTR-44 basket containing beryllium elements.
Regardless of the lid used, the joint between the lid and the body is made leak tight by two seals.
Each of these two lid models is provided with:
an orifice (A) composed of a quick-connect coupling and a protective plug (see figure 00.2). This quick connect coupling is used as a vent when the cavity is being filled with water and to inject air under pressure into the cavity when draining. The protective plug is fixed onto the lid by 4 screws and is fitted with seals making the containment leak tight (except for the transport of irradiator type contents),
an orifice (B) composed of a cover and a protective plug (see figure 00.2). This orifice is connected to the dip tube fixed onto the cavity of the packaging. The cover is removed when filling or draining water and when the cavity is dried.
The vacuum in the cavity is also created through this orifice. The protective plug is fixed onto the lid by 4 screws and is fitted with seals making the containment leak tight (except for the transport of irradiator type contents),
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 6 of 12 NON PROPRIETARY VERSION measurement taps to check the leak tightness of the containment and orifices
((except for the transport of irradiator type contents),
threaded holes for screwing lid handling elements.
The shock-absorbing cover is composed of wood blocks enclosed in a metal casing.
It is fixed to the packaging body by screws.
It comprises two recesses at each trunnion to enable the handling of the packaging when the shock absorbing cover is in position.
3.2 Presentation of the content of the TN-MTR packaging The content of the packaging consists of internal fittings and fuel or source elements specially shaped as irradiator or not, to be transported.
RHF basket and RHF type fuel elements: the RHF basket is a stainless steel cylinder in which 3 compartments are drilled for RHF elements. Two borated stainless steel shells for each compartment keep the package sub-critical. Appendix 1 in chapter 01 contains a detailed description of the RHF type basket and elements.
The MTR-68 basket and associated fuel elements: the MTR-68 basket is composed of a stack of perforated stainless steel and borated aluminium disks.
This basket comprises 68 complete compartments and 8 partial (unused) compartments. Appendix 2 in chapter 0A contains a detailed description of this basket.
The MTR-52 basket and associated fuel elements: the MTR-52 basket is composed of a stack of perforated stainless steel and borated aluminium disks.
This basket has 52 compartments: Appendix 3 in chapter 0A contains a detailed description of this basket and schematics of the holders.
The MTR-52S basket and associated fuel elements: the MTR-52S basket is composed of a stack of perforated stainless steel and borated aluminium disks. It is also characterised by a stainless steel lining of the section of the compartments over the height of the basket.
This basket has 52 compartments: Chapter 0A-4 contains a detailed description of this basket.
The MTR-44 basket and associated fuel or reflecting elements: the MTR-44 basket is composed of a stack of perforated stainless steel and borated aluminium disks.
This basket has 44 compartments: Appendix 5 in chapter 0A contains a detailed description of this basket.
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 7 of 12 NON PROPRIETARY VERSION CESOX special wedges: Appendix 11 in chapter 0A contains a detailed description of the wedges for the CESOX content containing a specially-shaped sealed 144Ce-144Pr source.
MTR-52SV2 basket and associated fuel elements: the MTR-52SV2 basket is composed of a stack of disks made of stainless steel and neutron absorbing materials, these neutron absorbing materials consisting of an aluminium ring supporting neutron absorbing flats (either borated aluminium or aluminium mixed with B4C). It is also characterised by a stainless steel lining of the section of the compartments over the height of the basket.
This basket has 52 compartments: Chapter 0A-9 contains a detailed description of this basket.
FRM-II basket and associated FRM-II type fuel elements: the FRM-II basket consists of a stack of stainless steel plates separated by spacers. The steel plates feature 7 compartments each fitted with 2 borated stainless steel shells (one at the centre of the FRM-II element and the other fitted into the compartment and surrounding the FRM-II element). Appendix 12 in chapter 0A contains a detailed description of this basket and FRM-II type elements.
Caesium trap special wedges: Appendix 13 in chapter 0A contains a detailed description of the wedges for the caesium trap content and its internal fittings.
Gisete special wedges: Appendix 14 in chapter 0A contains a detailed description of the wedges for the gisete content and its internal fittings.
- 4. APPLICABLE CODES AND REGULATIONS The following regulations are applied for the design of the packaging:
Regulations Regulations for the Safe Transport of Radioactive Materials of the International Atomic Energy Agency (IAEA) - Specific Safety Requirements No.SSR 2012 Arrté du 29 mai 2009 relatif aux transports de marchandises dangereuses par voies terrestres (arrté TMD)
European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) - 2015 edition; Regulations concerning the International Carriage of Dangerous Goods by Rail (RID)- 2015 Edition International Maritime Dangerous Goods (IMDG code by the IMO) - 2014 edition.
Rglement relatif la Sécurité des Navires (RSN), division 411, annexé larrté du23 novembre 1987 modifié.
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 8 of 12 NON PROPRIETARY VERSION Codes and standards used FEM handling rules.
CODAP 95 Construction Code for Pressure Vessels French standards for materials.
American National Standard Institute (ANSI): N14.5-1987, N14.6-1986 and N14.23; 1987 edition.
American Society of Mechanical Engineers (ASME), 1995 Revision.
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 9 of 12 NON PROPRIETARY VERSION LIST OF FIGURES Figure Description Pages 00.1 Exploded view of the TN-MTR packaging 1
00.2 Details of orifices in the packaging 2
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 10 of 12 NON PROPRIETARY VERSION FIGURE 00.1 EXPLODED VIEW OF THE TN-MTR PACKAGING
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 11 of 12 NON PROPRIETARY VERSION FIGURE 00.2 (1/2)
DETAILS OF PACKAGING ORIFICES Standard type lid DETAIL ORIFICE A QUICK-CONNECT COUPLING DETAIL ORIFICE B
Form: PM04-4-MO-6 rev.02 NON PROPRIETARY VERSION Orano TN Identification:
DOS-18-011415-001 NPV Version:
2.0 Page 12 of 12 NON PROPRIETARY VERSION FIGURE 00.2 (2/2)
DETAILS OF PACKAGING ORIFICES SEC type lid DETAIL OF ORIFICE A (Quick-connect fitting)
DETAIL OF ORIFICE B