ML18138A289
| ML18138A289 | |
| Person / Time | |
|---|---|
| Site: | 07201029 |
| Issue date: | 05/16/2018 |
| From: | Bondre J Orano USA |
| To: | Document Control Desk, Office of Nuclear Material Safety and Safeguards |
| References | |
| E-51647, EPID L-2017-LLA-0390 | |
| Download: ML18138A289 (6) | |
Text
0 orano Co lum bia Off i c e 7 1 35 M i nstre l Way Col um bia , MD 2 10 4 5 Tel: (410) 910-6900 @O r an o_USA U. S. Nuclear Regulatory Commission Attn: Document Control Desk One White Flint North 11555 Rockville Pike Rockville , MD 20852 May 16 , 2018 E-51647
Subject:
Application for Amendment No. 4 to Certificate of Compliance No. 1029 -Revised UFSAR Changed Pages (Docket 72-1029 , EPID No. L-2017-LLA
-0390)
Reference:
(1) Letter E-50760 from Jayant Bondre (TN Americas LLC) to U.S. NRC Document Control Desk , " Acceptance Review of TN Americas LLC Application for Amendment No. 4 to Certificate of Compliance No. 1029 -Response to Request for Supplemental Information
," dated February 22 , 2018 (Docket 72-1029) (2) NRC Conversation Record , " Safety Analysis Report Text Clarification Call" between Chris Allen (NRC) and TN Americas LLC , May 7 , 2018 (ADAMS Accession
- ML 18129A121)
This submittal provides revised updated final safety analysis report (UFSAR) changed pages based on recent discussion between NRC and TN Americas LLC (TN), as described in Reference
- 2. Based on this discussion , TN has revised the proposed changes to provide additional clarification on UFSAR pages 8.2-3 , A.8.2-2 and A.8.2-3. These changes are provided in Enclosure 1 of this submittal.
The footers of the UFSAR changed pages are annotated as 72-1029 Amendment No. 4 , May 2018 , Revision 2. UFSAR changes are tracked and indicated by revision bars and ital i cized text. The new changes are further annotated with rectangles enclosing the changed areas. Should NRC staff have any questions or require additional information to support the review of this application , please contact Mr. Dennis Williford by telephone at (704) 805-2223, or by email at Dennnis.Williford@orano
.group.
Document Control Desk May 16 , 2018 Sincerely, Jayant Bondre Chief Technical Officer cc: Chris Allen (NRC SFM) as follows, all provided in a separate mailing:
- Six paper copies of this cover letter and Enclosure 1
Enclosure:
E-51647 Page 2 of 2 1. CoC 1029 Amendment 4 Application , Revision 2 UFSAR Changed Pages (Public)
Enclosure 1 to E-51647 Coe 1029 Amendment 4 Application, Revision 2 UFSAR Changed Pages (Public)
Advanced NU HOMS System Updated Final Safety Analysis Report Rev. 5, 08/12 9. Wash the transfer cask to remove any dirt which may have accumulated durin g the 24PT1-DSC unloadin g and transfer operations.
- 10. Place scaffolding around the transfer cask so that any point on the s urface of the transfer cask is easily accessible to handlin g personnel.
- 11. Unbolt the transfer cask top cover plate. 12. Connect the rigging cables to the transfer cask top cover plate and lift the cover plate from the transfer cask. Set the transfer cask cover plate aside and disconnect the lid lifting cables. 13. Install temporary shielding to reduce personnel exposure as required.
Fill the transfer cask/24PT1-DSC annulus with clean demineralized water and seal the annulus. The process of unloading the 24PT 1-DSC into the spent fuel poo! i f available,! is similar to that used for loading. Operations that involve opening the 24PT1-DSC described below are to be carefully controlled in accordance with plant procedures.
These operations are to be performed under the site's standard health physics guidelines for welding, grinding, and handling of potentially highly contaminated equipment.
These are to include the use of prudent housekeeping measures and monitoring of airborne particulates. Procedures may require personnel to perform the work using respirators or supplied air. If fuel needs to be removed from the 24PT1-DSC, precautions must be taken for the presence of damaged or oxidized fuel and to prevent radiological exposure to personnel durin g this operation.
If degraded fuel is suspected , additional mea s ures appropriate for the specific conditions are to be planned, reviewed, and implemented to minimize exposures to workers and radiological releases to the environment.
A sampling of the atmosphere within the 24PT1-DSC should be taken prior to inspection or removal of fuel. If the work is performed outside the fuel handling building , a tent may be constructed over the work area which may be kept under a negative pressure to control airborne particulates. Any radioactive gas release will be Kr-85, which is not readily captured.
Whether the krypton is vented through the plant stack or allowed to be released directly depends on the plant operating requirements.
Following opening of the 24PT1-DSC, it is filled with demineralized or pool water prior to placement in the spent fuel pool to prevent a sudden inru s h of pool water. Parameters related to reflooding the 24PT1-DSC cavity are addressed in Chapter 3. Place transfer cask into the pool. The fuel unloadin rocedures listed belo w will be overned b the plant operating license under l O CFR Part 5 , and assume the availability of the spentfuel pool The generic procedures for these operations are as follows: 1. May2018 Revision 2 Locate the s iphon and vent port using the indications on the top cover plate. a portable drill press on the top of the 24PTI-DSC.
Align the drill over the siphon port. 72-10 29 Amendment No. 4 Place 8.2-3 I Advanced NUHOMS System Updated Final Safety Analysis Report Rev. 2, 08/06 6. Lift the transfer cask approximately one inch off the trunnion supports.
Visually inspect the yoke lifting hooks to insure that they are properly positioned on the trunnions.
- 7. Move the crane in a horizontal motion while simultaneously raising the crane hook vertically and lift the transfer cask off the trailer. Move the transfer cask to the cask decontamination area. 8. Lower the transfer cask into the cask decontamination area in the vertical position.
- 9. Wash the transfer cask to remove any dirt which may have accumulated during the 24PT4-DSC unloading and transfer operations.
JO. Place scaffolding around the transfer cask so that any point on the surface of the transfer cask is accessible to handling personnel.
- 11. Unbolt the transfer cask top cover plate. 12. Connect the rigging cables to the transfer cask top cover plate and lift the cover plate from the transfer cask. Set the transfer cask cover plate aside and disconnect the lid lifting cables. 13. Install temporary shielding to reduce personnel exposure as required.
Fill the transfer cask/24PT4-DSC annulus with clean water and seal the annulus The process of unloading the 24PT4-DSC into the spent fuel poo{ i f available ,! is similar to that used for loading. Operations that involve opening the 24PT4-DSC described below are to be carefully controlled in accordance with plant procedures.
These operations are to be performed under the site's standard health physics guidelines for welding, grinding, and handling of potentially highly contaminated equipment.
These are to include the use of prudent housekeeping measures and monitoring of airborne particulates. Procedures may require personnel to perform the work using respirators or supplied air. If fuel needs to be removed from the 24PT4-DSC , precautions must be taken for the presence of damaged or oxidized fuel and to prevent radiological exposure to personnel during this operation.
If degraded fuel is suspected, additional measures appropriate for the specific conditions are to be planned , reviewed, and implemented to minimize exposures to workers and radiological releases to the environment.
A sampling of the atmosphere within the 24PT4-DSC should be taken prior to inspection or removal of fuel. If the work is performed outside the fuel handling building , a tent may be constructed over the work area which may be kept under a negative pressure to control airborne particulates.
Any radioactive gas release will be Kr-85 , which is not readily captured.
Whether the krypton is vented through the plant stack or allowed to be released directly depends on the plant operating requirements. Ma y 2018 R e vi s ion 2 7 2-10 2 9 A m e ndm e nt No. 4 A.8.2-2 I Advanced NUHOMS System Updated Final Safety Analysis Report Rev. 5 , 08/12 I Following opening of the 24PT4-DSC , it is to be filled with demineralized or pool water prior to placement in the spent fuel pool to prevent a sudden inrush of pool water. Parameters related to reflooding the 24PT4-DSC cavity are addressed in Chapter A.3. Place transfer cask into the pool. The fuel unload in rocedures listed below will be overned b the plant operating license under 10 CFR Part 5 , and assume the availability of the spent fael pool The generic procedures for these operations are as follows: 1. Locate the siphon and vent port using the indications on the top cover plate. Place a portable drill press on top of the 24PT4-DSC.
Align the drill over the siphon port. 2. Place an exhaust hood or tent over the 24PT4-DSC, if necessary. The exhaust should be filtered or routed to the site radwaste system. 3. Drill a hole through the top cover plate to expose the siphon port quick connect. 4. Drill a second hole through the top cover plate to expose the vent port quick connect. CAUTION: (a) The water fill rate must be regulated during this reflooding operation to ensure that the 24PT4-DSC vent pressure does not exceed 20 psig. (b) Provide for continuous hydrogen monitoring of the 24PT4-DSC cavity atmosphere during all subsequent cutting operations to ensure that a safety limit of 2.4% hydrogen concentration is not exceeded.
Purge with 2-3 psig helium (or any other inert medium) as necessary to maintain the hydrogen concentration safely below this limit. 5. Obtain a sample of the 24PT4-DSC atmosphere (confirm acceptable hydrogen concentration). Fill the 24PT4-DSC with water from the fuel pool through the siphon port with the vent port open and routed to the plant's off-gas system. 6. Place welding blankets around the transfer cask and scaffolding.
- 7. Using plasma arc-gouging , a mechanical cutting system or other suitable means , remove the weld from the outer top cover plate and 24PT4-DSC shell. A fire watch should be placed on the scaffolding with the welder , as appropriate.
The exhaust system should be operating at all times. 8. The material or waste from the cutting or grinding process should be treated and handled in accordance with the plant's low level waste procedures unless determined otherwise. 9. Remove the top of the tent , if necessary. 10. Remove the exhaust hood , if necessary.
- 11. Remove the outer top cover plate. Ma y 201 8 R e vi s i o n 2 72-10 29 A m e ndm e nt No. 4 A.8.2-3 I