ML19114A298
| ML19114A298 | |
| 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: ML19114A298 (12) | |
Text
NON PROPRIETARY VERSION Form: PM04-4-MO-6 rev.02 Orano TN SAFETY ANALYSIS REPORT N O N P RO P R I ET AR Y V E R S I ON CHAPTER 0A - APPENDIX 14 Prepared by / signature Date TN-MTR T.WILLEMS Identification:
DOS-18-011415-041 Version:
1.0 Page 1 / 12 TN International DESCRIPTION OF THE GISETE CONTENT AND ITS SPECIFIC INTERNAL FITTINGS Table of Contents Revisions / versions history 2
Summary 3
- 1. Purpose 4
- 2. Description of the gisete content 4
- 3. Description of the internal fittings 5
- 4. Characteristics of the materials used in the internal fittings 6
- 5. Loading conditions 6
- 6. References 6
List of tables 7
List of figures 7
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 2 of 12 NON PROPRIETARY VERSION Revisions / versions history Rev. or Version Date Purpose and record of changes Prepared by / Checked by 1.0 See 1st page First issue T.WILLEMS/S.AZZAOUI
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 3 of 12 NON PROPRIETARY VERSION Summary This chapter presents the gisete content and its internal fittings.
The permissible gisete content consists of an isotope generator. There are three possible types of isotope generator: gisete 4, gisete 5 and gisete 8. The 3 types of isotope generator consist of a source block containing the radioactive material and a body providing radiological protection around this block.
The radioactive material consists of a strontium 90 titanium source (SrTiO3), in the form of sintered pellets classified as a non-fissile radioactive material according to the regulations.
The isotope generator is wedged in the TN-MTR cavity axially and radially by means of an internal fitting. There are 3 types of internal fitting; one for each type of isotope generator.
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 4 of 12 NON PROPRIETARY VERSION
- 1.
Purpose The purpose of this appendix to Chapter 0A is to describe the permissible gisete content for the TN-MTR Package Design. The permissible gisete content consists of 3 types of isotope generator:
gisete 4, gisete 5 and gisete 8.
This appendix also describes the internal fittings specific to the gisete content that wedge the isotope generators in the TN-MTR cavity.
- 2.
Description of the gisete content The permissible gisete content consists of an isotope generator. There are three possible types of isotope generator: gisete 4, gisete 5 and gisete 8. The 3 types of isotope generator consist of a source block containing the radioactive material and a body providing radiological protection around this block.
2.1. Description of the radioactive material The radioactive material consists of a strontium 90 titanium source (SrTiO3), in the form of sintered pellets, placed in a metal capsule, and forming the source block.
At the time of transport, the activity of the 90Sr contained in the isotope generator must not be greater than the following maximum activity:
Isotope
- Max. activities (TBq) 90Sr 897
- Any other isotope is authorised provided its activity is below the activity limit corresponding to an exempted consignment.
The radioactive material is non fissile according to the regulations 0.
The thermal power of the isotope generator is less than or equal to 160 W.
The level of non-fixed contamination on the external surface of the isotope generator body must be within the following limits (mean limits applicable for any surface area of 300 cm² on any part of its surface):
400 Bq/cm2 for beta and gamma emitters and low-toxicity alpha emitters; 40 Bq/cm2 for all other alpha emitters.
2.2. Description of the isotope generator body The main components of the isotope generator body are:
a tungsten alloy or depleted uranium primary shield containing the source block; a ceramic thermal insulation block; a lead or grey cast iron secondary shield (absent on gisete 8) constituting the bodys outer plate. On gisete 8, the bodys outer plate is metallic; a closure system that can contain an electricity generation block (the block is absent from gisete 8);
These different components can be equipped with attachment systems (screws, tie-rods, etc.)
or gaskets.
Different devices required for the functioning of the isotope generators are located on their upper part. They can be protected by a metal cover (absent on gisete 4).
The flow diagrams of the isotope generators are shown in figure 0A-14.1
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 5 of 12 NON PROPRIETARY VERSION 2.3. Masses and dimensions The maximum mass of the isotope generators is given in the following table:
Type of isotope generator Maximum mass (kg) gisete 4 2,270 gisete 5 1,670 gisete 8 212 The main dimensions of the isotope generators are indicated in the following table (see figure 0A-14.1):
Type of isotope generator Nominal overall dimensions (mm)
Diameter Height gisete 4 848 875 gisete 5 695 855 gisete 8 565 659
- 3.
Description of the internal fittings The isotope generator is wedged in the TN-MTR cavity axially and radially by means of an internal fitting.
There are three types of internal fittings:
the gisete 4 internal fitting to wedge the gisete 4 type of isotope generator; the gisete 5 internal fitting to wedge the gisete 5 type of isotope generator; the gisete 8 internal fitting to wedge the gisete 8 type of isotope generator; The drawing of the internal fittings is shown in appendix 0A-14-1.
The internal fittings have 2 parts:
a radial wedge that can be fitted with a bottom, whose function is to radially wedge the gisete content in the TN-MTR cavity; an axial wedge, whose purpose is to axially wedge the gisete content in the TN-MTR cavity and reduce the axial gap between the internal fitting and the lid.
3.1. Description of the radial wedge The radial wedge comprises:
1 inner shell (07) that can consist of several butt-welded elements; 1 outer shell (05) that can consist of several butt-welded elements; 1 lateral guide (08), welded to the outer shell (05), guiding the fitting in the TN-MTR cask along its dip tube; 3 rings (06) connecting the inner and outer shells by means of tab and slot joints.
The inner shell of the gisete 4 internal fitting is slotted for handling of the radial wedge.
The radial wedge for gisete 5 and gisete 8 internal fittings also comprises:
1 bottom disc (09) which supports the gisete content;
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 6 of 12 NON PROPRIETARY VERSION 3 lifting systems to handle the wedge, possibly loaded with the isotope generator by means of a ring.
3.2. Description of the axial wedge The axial wedge comprises:
1 upper disc (01) incorporating 3 threaded holes equipped with thread inserts (203) used for handling of the axial wedge; 1 lower disc (03) with a hole in the middle.
For gisete 4 and gisete 5 internal fittings the axial wedge also comprises:
1 shell (02) that can consist of several butt-welded elements separating the two discs (01)
(03). The shell is fastened to each of the discs by means of 6 screws with washers (200) and (201) with thread inserts (204) and 2 cylindrical pins (202).
For gisete 8 internal fittings the axial wedge also comprises:
3 gusset plates (02) separating the 2 discs (01) (03). The gusset plates are fastened to each of the discs by means of 2 screws with washers (200) and (201) with thread inserts (204) and 2 cylindrical pins (202).
For this internal fitting, the gisete 8 type of isotope generator must be adjusted so that the generator handling lugs are opposite the holes provided in the lower disc (03) of the axial wedge.
3.3. Masses The maximum masses of the different elements constituting the fittings are presented in the following table:
Internal fittings type Maximum mass of axial wedge (kg)
Maximum mass of radial wedge (kg) gisete 4 255 155 gisete 5 205 295 gisete 8 225 260
- 4.
Characteristics of the materials used in the internal fittings The materials used to manufacture the internal fittings are listed in table 0A-14.1.
The following materials must fulfil particular specifications:
4.1. Aluminium type A The structural parts of the internal fittings are made from aluminium type A: aluminium alloy grade EN AW-5083 O, H111 or H112 according to EN 485-2 or 5083 Temper O, H111 or H112 according to ASTM B209M or equivalent.
The mechanical characteristics of this material are given in Table 0A-14.2.
- 5.
Loading conditions The cavity of the TN-MTR cask is filled with air (or helium, nitrogen or any other inert gas) at atmospheric pressure.
- 6.
References Applicable IAEA regulation: see chapter 00
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 7 of 12 NON PROPRIETARY VERSION List of tables Table Description Page 0A-14.1 Bill of materials for internal fittings 1
0A-14.2 Mechanical properties of the materials used in the internal fittings 1
List of figures Figure Description Page 0A-14.1 Flow diagram of gisete content 1
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 8 of 12 NON PROPRIETARY VERSION TABLE 0A-14.1 BILL OF MATERIALS FOR INTERNAL FITTINGS Item Description Material Quantity per internal fitting Gisete 4 Gisete 5 Gisete 8 Axial wedge 01 Top disc Aluminium type A 1
02 Shell or gusset plate Aluminium type A 1
(shell) 3 (gusset plate) 03 Lower disc Aluminium type A 1
200 Screw Metallic 12 201 Washer Metallic 12 202 Pin Metallic 4
12 203 Thread inserts Metallic 3
204 Thread inserts Metallic 12 Radial wedge 05 Outer shell Aluminium type A 1
06 Ring Aluminium type A 3
07 Inner shell Aluminium type A 1
08 Lateral guide Aluminium type A 1
09 Bottom disc Aluminium type A 0
1 10 Lifting system Metallic 0
3
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 9 of 12 NON PROPRIETARY VERSION TABLE 0A-14.2 MECHANICAL PROPERTIES OF THE MATERIALS USED IN THE INTERNAL FITTINGS Material Aluminium type A Aluminium alloy grade EN AW-5083 O, H111 or H112 according to EN 485-2 or 5083 Temper O, H111 or H112 according to ASTM B209M.
or equivalent Characteristics Value Evidence for properties (A) inspections during production (B) qualification (C) reference (A)
(B)
(C)
Comment Yield strength 115 MPa @20°C According to EN 485-2 or ASTM B209M 100 MPa @100°C (1)
Ultimate tensile strength 270 MPa @20°C According to EN 485-2 or ASTM B209M Modulus of elasticity 71 000 MPa @25°C According to ASME II-D Subpart 2 Table TM-2 for A95083 68 000 MPa @100°C Poisson's ratio 0.33 According to ASME II-D Subpart 2 Table PRD for A95083 Thermal expansion 23.4.10-6 K-1 @100°C According to ASME II-D Subpart 2 Table TE-2 for A95083 (1) : checked at O temper
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 10 of 12 NON PROPRIETARY VERSION FIGURE 0A-14.1 (1/3)
FLOW DIAGRAM OF GISETE CONTENT gisete 4 type of isotope generator (cross-section view)
Nominal dimensions in mm Overall diameter: 848 Overall height:
875
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 11 of 12 NON PROPRIETARY VERSION FIGURE 0A-14.2 (2/3)
FLOW DIAGRAM OF GISETE CONTENT gisete 5 type of isotope generator (cross-section view)
Nominal dimensions in mm Overall diameter: 695 Overall height:
855
Form: PM04-4-MO-6 rev.02 N O N P RO P R I ET AR Y V E R S I ON Orano TN Identification:
DOS-18-011415-041 Version:
1.0 Page 12 of 12 NON PROPRIETARY VERSION FIGURE 0A-14.3 (3/3)
FLOW DIAGRAM OF GISETE CONTENT gisete 8 type of isotope generator (cross-section view)
Nominal dimensions in mm Overall diameter: 565 Overall height:
659