ML18331A320
| ML18331A320 | |
| Person / Time | |
|---|---|
| Site: | 07200020 |
| Issue date: | 07/11/2018 |
| From: | Orano Federal Services |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML18331A337 | List: |
| References | |
| CLN190154 | |
| Download: ML18331A320 (21) | |
Text
Orano Federal Services July 11, 2018 Records Management CALC-3021323-000 Page 1 of 21 a
orano Orano Federal Services CALCULATION Document No.:
CALC-3021323 Rev. No.
000 Pa e 1 of 21 Pro*ect No.:
02029.00.0000.02 Pro*ect Name:
License Renewal Support
Title:
TMl-2 Canister To -End Dose Rates for TMl-2 ISFSI License Renewal Summary:
The Nuclear Regulatory Commission (NRC) has requested additional information to support the technical review of the Three Mile Island Unit 2 (TMl-2) Independent Spent Fuel Storage Installation (ISFSI) license renewal.
Request for additional information (RAI) 2-2 questions the dry shielded canister (DSC) basket and its exclusion from the scope of the renewal review. Specifically, RAI 2-2 is concerned with the change in vent and purge port dose rates should TMl-2 Canisters realign.
RAI 3-6 challenges the assertion that Licon degradation within each TMl-2 Canister will cause a "negligible" increase in top-end dose rates.
This calculation reevaluates DSC top-end dose rates, including vent port dose rates, to support the responses to the above RAls.
Safety [gl Non-Safety D
Contains Unverified Input/ Assumptions:
Yes: D No: [gl Software Utilized: Yes Version:
Software Active in FS EASI: Yes: [g] NA*: 0 MCNP6.1
- Not Applicable per Section 5. 7 of FS-EN-PRC-002 Error Notices & Associated Corrective Actions Reviewed: Yes: [gl No: D Printed Name Preparer:
E. Gonsiorowski Checker:
S. Gibboney Approver:
D. Hillstrom Other:
FS-EN-FRM-002 Rev. 10 (Effective March 1, 2018)
Refer to FS-EN-PRC-002 Excel 2010*
Storage Media: Yes: [gl No: D Location:
COLDStor Signature Date
Page 2 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Revision History Rev.
Changes 000 Initial Release CALC-3021323-000 Page 2 of 21
Page 3 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Table of Contents Page REVISION HISTORY............................................................................................................................. 2 LIST OF TABLES.................................................................................................................................. 4 LIST OF FIGURES................................................................................................................................ 4 1.0 PURPOSE.................................................................................................................................. 5 2.0 METHODOLOGY....................................................................................................................... 5 3.0 ASSUMPTIONS......................................................................................................................... 6 3.1 Unverified Assumptions..................................................................................................................... 6 3.2 Justified Assumptions........................................................................................................................ 6 4.0 DESIGN INPUTS........................................................................................................................ 6 4.1 Design Features................................................................................................................................ 6 4.2 Source Specification.......................................................................................................................... 9 4.3 Material Properties............................................................................................................................ 9 5.0 CALCULATIONS........................................................................................................................ 9 5.1 Methods............................................................................................................................................. 9 5.2 Configuration of Source and Shielding.............................................................................................. 9 5.3 Flux-to-Dose Rate Conversion........................................................................................................ 16 6.0 RESULTS AND CONCLUSIONS............................................................................................. 17 7.0 COMPUTER SOFTWARE USAGE........................................................................................... 19 7.1 In-Use Testing of MCNP6.1............................................................................................................ 19 7.2 File Listing....................................................................................................................................... 19
8.0 REFERENCES
......................................................................................................................... 21 CALC-3021323-000 Page 3 of 21
Page 4 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support List of Tables Page Table 5-1: ANSI/ANS-6.1.1-1977 Photon Flux-to-Dose Rate Conversion Factors................................ 16 Table 6-1: Top-End Dose Rates (mrem/hr).......................................................................................... 18 List of Figures Page Figure 4-1: NUHOMS-12T Canister Basket [4]..................................................................................... 7 Figure 4-2: NUHOMS-12T HSM Rear View [4]..................................................................................... 8 Figure 5-1: TMI-2 DSC Model, Normal Configuration (with Licon)........................................................ 11 Figure 5-2: TMI-2 DSC Model, Top-End Features................................................................................ 11 Figure 5-3: TMI-2 DSC Model, Configuration 1.................................................................................... 12 Figure 5-4: TMI-2 DSC Model, Configuration 2.................................................................................... 13 Figure 5-5: TMI-2 DSC Model, Normal Configuration without Licon..................................................... 14 Figure 5-6: TMI-2 DSC Model, Configuration 2 without Licon............................................................... 15 CALC-3021323-000 Page 4 of 21
Page 5 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support 1.0 PURPOSE The Nuclear Regulatory Commission (NRC) has requested additional information to support the technical review of the Three Mile Island Unit 2 (TMI-2) Independent Spent Fuel Storage Installation (ISFSI) license renewal application (LRA) [1]. Request for additional information (RAI) 2-2 questions the dry shielded canister (DSC) basket and its exclusion from the scope of the renewal review. Specifically, RAI 2-2 is concerned with the change in vent and purge port dose rates should TMI-2 Canisters reconfigure. RAI 3-6 challenges the assertion that Licon degradation will cause a negligible increase in top end dose rates.
This calculation reevaluates DSC top-end dose rates, including vent port dose rates, following the loss of DSC basket integrity and loss of Licon shielding. The results of this calculation will serve as the technical basis for the responses to RAI 2-2 and RAI 3-6.
2.0 METHODOLOGY The DSC basket (detailed in [2]) is identified as a NITS (Not Important to Safety) subcomponent of an ITS (Important to Safety) structure, system, or component (SSC), the DSC (see Section 2.3.3 of the LRA [3]). Thus, per Table 2-4 of the LRA, the DSC basket is not within the scope of the license renewal. RAI 2-2 is concerned that the basket is relied upon to maintain DSC vent and purge port dose rates. If the basket were to fail, personnel may be seriously affected by increased dose rates resulting from the reconfiguration of TMI-2 Canisters (meaning the basket needs to be included in the renewal scope as an ITS component).
Similarly, RAI 3-6 is concerned with top-end dose rates following degradation of Licon shielding within the TMI-2 Canisters. Section 3.8.4.5 of [3] asserts that the relative impact of Licon shielding on top-end dose rates is negligible compared to steel shielding within the DSC and TMI-2 Canisters. RAI 3-6 questions whether this statement is sufficiently justified, and thus additional information is necessary to quantify the acceptable degradation of Licon with respect to dose rates.
Shielding analysis of the DSC top-end dose rates, including the vent port, is discussed in part (d) of Section 7.3.2.2 of the TMI-2 Safety Analysis Report (SAR) [4]. The peak DSC vent port gamma and neutron dose rates of 926 mrem/hr and 42 mrem/hr respectively are reported in SAR Table 7.3-1. The gamma dose rate is originally calculated in [5] using MCNP models while the neutron dose rate is originally calculated in Section 6.3 of [6]
using a hand calculation. Purge port dose rates are not independently calculated since vent port dose rates bound purge port dose rates (originally assumed in [5]).
To evaluate the importance of the DSC basket and TMI-2 Canister Licon, the original, design-basis shielding model used in [5] is modified and reevaluated following (1) the reconfiguration of TMI-2 Canisters due to the loss of DSC basket integrity and (2) the loss of TMI-2 Canister Licon shielding. Neutron dose rates are not reevaluated since they are relatively small compared to gamma dose rates (<5%). MCNP is used to perform the shielding analysis. Modifications to the shielding model are minimized to ensure outputs are comparable to those originally generated. Shielding performance is evaluated in accordance with limits in 10 CFR 20, 10 CFR 72, and the Limiting Conditions for Operation (LCO) 3.2.2 included in the TMI-2 ISFSI Technical Specifications [18].
CALC-3021323-000 Page 5 of 21
Page 6 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support 3.0 ASSUMPTIONS 3.1 Unverified Assumptions There are no unverified assumptions.
3.2 Justified Assumptions
- 1. Neutron dose rates are not reevaluated. Based on previous analysis [6], neutrons do not significantly contribute to top-end dose rates. In addition, neglecting low neutron dose rates is consistent with Section 7.4.2 of the SAR [4].
- 2. Vent port dose rates are assumed to bound purge port dose rates, consistent with [5]. Based on visual analysis of the vent and purge ports in [12], this is reasonable. This assumption was not previously challenged by the NRC based on acceptance of the SAR.
- 3. The two TMI-2 Canister reconfiguration scenarios evaluated bound any possible reconfiguration scenario following the loss of DSC basket integrity. The TMI-2 Canister reconfiguration scenarios evaluated assume optimal packing of TMI-2 Canisters and neglect the presence of the purge port shield block.
- 4. TMI-2 Canisters will not realign directly under the vent port. The vent port shield is long enough that a canister must be at a significant angle (relative to the normal horizontal storage alignment) to align directly under the vent port. This alignment scenario is not plausible due to the initial orientations of the TMI-2 Canisters and the DSCs (see Figure 4-1 and Figure 4-2).
- 5. Point detectors used in the original shielding model [5] are replaced by 1 in.3 volumetric mesh tallies in the same locations. These mesh tallies are assumed to be sufficiently small enough to yield results similar to point detectors (mesh tally volume is unrelated to exclusion sphere volume). The use of point detectors is reserved for instances where mesh tallies do not sufficiently converge.
- 6. Large differences in dose rates between original [5] and new shielding models are expected due to the large relative errors in the original model results.
4.0 DESIGN INPUTS 4.1 Design Features The TMI-2 ISFSI is comprised of concrete horizontal storage modules (HSMs) containing steel DSCs. Within each DSC, a steel basket holds twelve TMI-2 core debris Canisters. The steel basket and DSC assemblies are detailed in [2], [10], [11], and [12]. The TMI-2 Canisters are detailed in [13], [14], and [15]. The orientation of the basket within each DSC is shown in Figure 4-1, while the orientation of each DSC within an HSM is shown Figure 4-2.
No changes are made to the geometry used in [5] except for the removal of the steel basket (and resulting repositioning of the TMI-2 Canisters) or the removal of Licon. The model used in [5] was created before finalization of the SAR drawings, and thus does not fully match the SAR drawings. Differences include the number of spacers in the basket assembly and spacer dimensions. These differences are maintained to keep reanalysis consistent with the design-basis shielding analysis.
CALC-3021323-000 Page 6 of 21
Page 7 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 4-1: NUHOMS-12T Canister Basket [4]
CALC-3021323-000 Page 7 of 21
Page 8 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 4-2: NUHOMS-12T HSM Rear View [4]
CALC-3021323-000 Page 8 of 21
Page 9 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support 4.2 Source Specification No changes are made to the source strength and spectrum used in [5]. The design-basis source is originally calculated in [9]. No credit is taken for additional decay of the source.
4.3 Material Properties No changes are made to the material compositions used in [5]. All air is modeled as void.
5.0 CALCULATIONS 5.1 Methods Top-end dose rates for the TMI-2 DSC are computed using MCNP6.1 [16]. The original model used in [5] is contained in the file Original.txt. Due to the high tally errors in [5], various optimizations are made to the original model. The optimizations are as follows:
Splitting layers are added and importance splitting is implemented. Splitting layers are placed within existing cells and do not alter the geometry of the model. Air outside the DSC is converted to void to support importance splitting, but this change does not affect resulting dose rates.
The source definition is rebuilt. The original source definition was very inefficient, wasting significant computational time generating and rejecting invalid source positions. Additionally, the original source definition included ineffective biasing. Cell transformations are reorganized to support the rebuilt source definition.
Point detectors are removed and replaced by mesh tallies of sufficiently small volume (see Section 3.2, Justified Assumptions). Point detectors result in a significant increase in computational time per particle history, and thus their use is limited to instances where mesh tallies do not sufficiently converge. When used, point detectors are altered to satisfy the guidance on exclusion spheres contained within Section 3.3.5.1.2 of [16].
Enabled the generation of bremsstrahlung photons and improved random number generation based on MCNP6.1 run warnings.
Five unique model geometries are evaluated: the normal configuration originally evaluated in [5] with the TMI-2 Fuel Canister Licon modeled, two TMI-2 Canister reconfiguration scenarios with the DSC basket removed, the normal TMI-2 Canister configuration with Licon removed, and the more-conservative (based on resulting dose rates) TMI-2 Canister reconfiguration scenario with Licon removed. Dose rates are calculated with the surface tallies originally used in [5] and mesh tallies/point detectors based on the point detectors originally used in [5].
5.2 Configuration of Source and Shielding The DSC top-end features are fully modeled, while features at the bottom-end are omitted. Top-end features include the inner shield plug, slanted vent port, and HEPA filter assembly. The purge port is not modeled since vent port dose rates will be similar but conservatively bounding relative to purge port dose rates (see Section 3.2, Justified Assumptions). The normal configuration model is shown in Figure 5-1, with a detailed view of the top-end features shown in Figure 5-2.
Two TMI-2 Canister reconfiguration scenarios (referred to as Configuration 1 and Configuration 2) are evaluated with the DSC basket modeled as void. TMI-2 Canisters are radially packed as closely as possible around the vent port and shifted axially towards the top-end to maximize dose rates. The Configuration 1 model is shown in Figure 5-3 while the Configuration 2 model is shown in Figure 5-4.
CALC-3021323-000 Page 9 of 21
Page 10 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Two Licon-removed models are evaluated with TMI-2 Canister Licon modeled as void. The normal configuration model with Licon removed is shown in Figure 5-5, while the Configuration 2 model with Licon removed is shown in Figure 5-6. Based on the results generated with Licon included, Configuration 2 is selected for additional analysis with Licon removed due to higher top-end dose rates than Configuration 1.
CALC-3021323-000 Page 10 of 21
Page 11 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 5-1: TMI-2 DSC Model, Normal Configuration (with Licon)
Figure 5-2: TMI-2 DSC Model, Top-End Features CALC-3021323-000 Page 11 of 21
Page 12 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 5-3: TMI-2 DSC Model, Configuration 1 CALC-3021323-000 Page 12 of 21
Page 13 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 5-4: TMI-2 DSC Model, Configuration 2 CALC-3021323-000 Page 13 of 21
Page 14 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 5-5: TMI-2 DSC Model, Normal Configuration without Licon CALC-3021323-000 Page 14 of 21
Page 15 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Figure 5-6: TMI-2 DSC Model, Configuration 2 without Licon CALC-3021323-000 Page 15 of 21
Page 16 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support 5.3 Flux-to-Dose Rate Conversion ANSI/ANS-6.1.1-1977 photon flux-to-dose rate conversion factors are used in this analysis. These factors were originally used in [5] and can be obtained from the MCNP6TM Users Manual, Appendix D, Table 11-2 [16]. The conversion factors in [16] have been multiplied by a factor of 1000 to generate dose rates in units of mrem/hr rather than rem/hr. The conversion factors are provided in Table 5-1. Run files maintain the style and format of the DE and DF cards used in [5], which neglect the 15 MeV point. This is acceptable since the maximum source photon energy is 9.5 MeV.
Table 5-1: ANSI/ANS-6.1.1-1977 Photon Flux-to-Dose Rate Conversion Factors Energy (MeV)
Gamma Factors (mrem/hr)/(/cm2-s) 0.01 3.96E-03 0.03 5.82E-04 0.05 2.90E-04 0.07 2.58E-04 0.10 2.83E-04 0.15 3.79E-04 0.20 5.01E-04 0.25 6.31E-04 0.30 7.59E-04 0.35 8.78E-04 0.40 9.85E-04 0.45 1.08E-03 0.50 1.17E-03 0.55 1.27E-03 0.60 1.36E-03 0.65 1.44E-03 0.70 1.52E-03 0.80 1.68E-03 1.00 1.98E-03 Energy (MeV)
Gamma Factors (mrem/hr)/(/cm2-s) 1.40 2.51E-03 1.80 2.99E-03 2.20 3.42E-03 2.60 3.82E-03 2.80 4.01E-03 3.25 4.41E-03 3.75 4.83E-03 4.25 5.23E-03 4.75 5.60E-03 5.00 5.80E-03 5.25 6.01E-03 5.75 6.37E-03 6.25 6.74E-03 6.75 7.11E-03 7.50 7.66E-03 9.00 8.77E-03 11.00 1.03E-02 13.00 1.18E-02 15.00 1.33E-02 CALC-3021323-000 Page 16 of 21
Page 17 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support 6.0 RESULTS AND CONCLUSIONS Two sets of surface tallies are used to measure general area dose rates at two axial locations: the vent port entry and the HEPA filter external surface (see Figure 5-2). Similarly, volumetric meshes (or point detectors when necessary per Section 5.1, Methods) are used to measure point dose rates at the same two axial locations. For a drawing of all tally locations, see Figure 6 in [5]. While all tally locations are reanalyzed, many measured dose rates are in locations of little relevance (due to the inaccessibility of those locations during storage). All tally results are compiled in the spreadsheet Results.xlsx, but only results of significance (e.g. vent port dose rates) are reported in this section. Dose rates of significance are reported in Table 6-1. All tally relative errors are either less than 10% for flux tallies (except for one tally at 10.7%) or 5% for point detectors.
It can be seen that the optimizations made to the design-basis shielding model result in similar (or at least higher) dose rates near the vent port, with good agreement between maximum values at the vent port entry center.
Configuration 1 and Configuration 2 do not differ from each other in a statistically significant way, with the higher peak vent port entry and HEPA filter surface dose rates of Configuration 2 rising to 3,269 mrem/hr and 109 mrem/hr respectively. In isolation (i.e. without TMI-2 Canister reconfiguration), removal of Licon shielding results in a much smaller increase in dose rates, as the same dose rates rise only to 1,278 mrem/hr and 55 mrem/hr. When reconfiguration and Licon removal occur together, peak vent port entry and HEPA filter surface dose rates reach maximum-possible values of 4,344 mrem/hr and 174 mrem/hr respectively.
RAI 2-2 and RAI 3-6 requests additional information to ensure compliance with 10 CFR 72 [8], subparts 24(e),
122(h)(5), and 42(a). 10 CFR 72.24(e) is the only subpart to contain dose rate limits as it requires compliance with 10 CFR 20 [7]. 10 CFR 20.1201 limits vary depending on the affected part of the body, but total effective dose equivalent is limited to 5,000 mrem/yr for onsite worker personnel. While the vent port entry peak dose rate is greater than 4,000 mrem/hr, the inaccessibility of the vent port entry (requires disassembly of the HEPA filter to access) means it is not a concern that a worker will exceed this limit. Additional limits are specified in LCO 3.2.2 within the TMI-2 ISFSI Technical Specifications [18]. LCO 3.2.2 requires that the surface dose rate of each HEPA filter housing shall not exceed 1200 mrem/hr. There is no concern that this limit will be violated, with calculated HEPA filter surface dose rates significantly less than 1200 mrem/hr.
In relation to RAI 2-2, it can be concluded that the classification of the DSC basket as a NITS item is acceptable.
The dose rates resulting from removal of the DSC basket, which bounds any possible degradation or aging of the DSC basket, do not result in the violation of applicable limits (i.e. 109 mrem/hr with basket removed in Configuration #2). The margin to the LCO 3.2.2 limit is 1091 mrem/hr. In relation to RAI 3-6, the effect of maximum Licon degradation has been quantified. It can be concluded that the dose rates resulting from the removal of Licon shielding, which bounds any possible degradation or aging of Licon, are similar in magnitude to dose rates with no Licon degradation (i.e. 55 mrem/hr with Licon removed). The margin to the LCO 3.2.2 limit is 1145 mrem/hr. When bounding DSC basket degradation and bounding Licon degradation are combined, dose rates are still acceptable relative to applicable limits (i.e. 174 mrem/hr with Licon removed and Configuration #2 of TMI-2 Canister rearrangement without basket). The margin to the LCO 3.2.2 limit is 1026 mrem/hr.
Furthermore, based on final two steps in Table 7.4-1 from the SAR [4] (i.e. Open Rear Wall Access Door, Remove the Filter Transportation Covers, Visually Check HEPA Filters, and Close Access Door and Perform Radiation Survey), worker exposure time will be two hours per year. Assuming a constant, worst-case dose rate of 174 mrem/hr for the two hour period results in an annual dose of 348 mrem per worker. The margin to the 10 CFR 20.1201 limit is 4652 mrem.
CALC-3021323-000 Page 17 of 21
Page 18 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support Table 6-1: Top-End Dose Rates (mrem/hr)
Licon Included Licon Removed Normal Configuration [5]
Normal Configuration Configuration
- 1 Configuration
- 2 Normal Configuration Configuration
- 2 Tally Location Result Error Result Error Result Error Result Error Result Error Result Error Vent Port Entry Area 7.253E+01 43%
94 5%
290 1%
291 1%
129 2%
405 1%
Center 9.258E+02 15%
1032 5%
3267 2%
3269 2%
1278 5%
4344 1%
Edge 6.505E+01 27%
180 7%
677 6%
679 6%
309 6%
1052 4%
HEPA Filter Surface Area 8.521E+00 65%
14 9%
39 2%
39 2%
18 4%
58 1%
Center 3.115E+00 19%
35 5%
108 3%
109 3%
55 5%
174 3%
Edge 1.724E+00 16%
15 5%
50 9%
50 9%
23 6%
88 6%
CALC-3021323-000 Page 18 of 21
Page 19 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support 7.0 COMPUTER SOFTWARE USAGE Computer Name:
EGONSIOROWSKI1 Hardware Profile of Computer:
Intel Xeon CPU E5-1650 @ 3.50 GHz, 16.0 GB RAM Operating System:
64-bit Windows 7 Enterprise, Service Pack 1 7.1 In-Use Testing of MCNP6.1 Input files buildup_fe_5_mfp.i and buildup_pb_1_mfp.i are taken from the MCNP6.1 software dedication report
[17] for in-use testing. Both files are run on 4/19/2018. The resulting output files are identical to those in [17]
except for run-unique parameters (such as date and time of run), indicating that MCNP6.1 performs as expected and is acceptable for use.
7.2 File Listing Directory: Runs\\In-Use Testing Mode LastWriteTime Length Name
-a--- 9/21/2017 2:20 PM 2974 buildup_fe_5_mfp.i
-a--- 4/19/2018 1:15 PM 26459 buildup_fe_5_mfp.o
-a--- 9/21/2017 2:20 PM 2706 buildup_pb_1_mfp.i
-a--- 4/19/2018 1:22 PM 23750 buildup_pb_1_mfp.o Directory: Runs\\Shielding Mode LastWriteTime Length Name
-a--- 4/5/2018 1:57 PM 16887 Original.txt Directory: Runs\\Shielding\\Modified Original Mode LastWriteTime Length Name
-a--- 4/10/2018 4:06 PM 20934 modified_original_f2.i
-a--- 4/11/2018 7:01 AM 2968 modified_original_f2.m
-a--- 4/11/2018 7:01 AM 2319 modified_original_f2.mt
-a--- 4/11/2018 7:01 AM 146145 modified_original_f2.o
-a--- 4/16/2018 8:09 AM 19420 modified_original_f5-2.i
-a--- 4/16/2018 12:43 PM 1614 modified_original_f5-2.m
-a--- 4/16/2018 12:43 PM 150771 modified_original_f5-2.o
-a--- 4/13/2018 8:20 AM 19423 modified_original_f5-7.i
-a--- 4/16/2018 6:42 PM 1250 modified_original_f5-7.m
-a--- 4/16/2018 6:42 PM 135295 modified_original_f5-7.o Directory: Runs\\Shielding\\No Licon Mode LastWriteTime Length Name
-a--- 4/19/2018 10:03 AM 21010 no_licon_config2_f2.i
-a--- 4/20/2018 3:35 PM 2448 no_licon_config2_f2.m
-a--- 4/20/2018 3:35 PM 2319 no_licon_config2_f2.mt
-a--- 4/20/2018 3:35 PM 175271 no_licon_config2_f2.o
-a--- 4/17/2018 8:28 AM 20933 no_licon_original_f2.i
-a--- 4/18/2018 8:32 AM 2864 no_licon_original_f2.m CALC-3021323-000 Page 19 of 21
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TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support
-a--- 4/18/2018 8:32 AM 2319 no_licon_original_f2.mt
-a--- 4/18/2018 8:32 AM 175802 no_licon_original_f2.o
-a--- 4/18/2018 1:29 PM 19420 no_licon_original_f5-2.i
-a--- 4/18/2018 4:51 PM 1562 no_licon_original_f5-2.m
-a--- 4/18/2018 4:51 PM 143768 no_licon_original_f5-2.o
-a--- 4/18/2018 1:54 PM 19423 no_licon_original_f5-7.i
-a--- 4/18/2018 10:26 PM 1614 no_licon_original_f5-7.m
-a--- 4/18/2018 10:26 PM 152559 no_licon_original_f5-7.o Directory: Runs\\Shielding\\Reconfigurations Mode LastWriteTime Length Name
-a--- 4/13/2018 10:41 AM 21038 config1_f2.i
-a--- 4/14/2018 2:26 PM 2656 config1_f2.m
-a--- 4/14/2018 2:26 PM 2319 config1_f2.mt
-a--- 4/14/2018 2:26 PM 174146 config1_f2.o
-a--- 4/13/2018 10:42 AM 21010 config2_f2.i
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-a--- 4/11/2018 3:51 PM 10455 General Tables.xlsx
-a--- 4/23/2018 4:59 PM 16732 Results.xlsx CALC-3021323-000 Page 20 of 21
Page 21 of 21 Orano Federal Services
Title:
TMI-2 Canister Top-End Dose Rates for TMI-2 ISFSI License Renewal Doc./Rev.: CALC-3021323-000 Project:
02029.00.0000.02 - License Renewal Support
8.0 REFERENCES
- 1. NRC Correspondence, Request for Additional Information for the Technical Review of the Application for Renewal of the Three Mile Island Unit 2 Independent Spent Fuel Storage Installation License No. SNM-2508, January 29, 2018
- 2. Transnuclear West Drawing, Dry Shielded Canister Basket Assembly Safety Analysis Report, Drawing Number 219-02-2000, Revision 1
- 3. License Renewal Application, TMI-2 Independent Spent Fuel Storage Installation Application for 10 CFR 72 Specific License Renewal, Special Nuclear Materials License Number SNM-2508 (Docket No.
72-20), Revision 0
- 4. Safety Analysis Report, TMI-2 Safety Analysis Report, Materials License No. SNM-2508, Amendment 4
- 5. Vectra Calculation, Top End Dose Rates for TMI-2 Canisters, Calculation Number 219-02.0403, Revision 0, September 1996
- 6. Engineering Design File, Impact of AmBeCm Sources on the TMI-2 ISFSI Design Basis, EDF No. 1793, March 2001
- 7. Title 10, Energy, Code of Federal Regulations, Part 20, Standards for Protection Against Radiation
- 8. Title 10, Energy, Code of Federal Regulations, Part 72, Licensing Requirements for the Independent Storage of Spent Nuclear Fuel, High-Level Radioactive Waste, and Reactor-Related Greater than Class C Waste
- 9. Vectra Calculation, Design Basis Source term Calculation for the TMI-2 Debris Canisters, Calculation Number 291-02.0400, Revision 0, September 1996
- 10. Transnuclear West Drawing, Dry Shielded Canister Shell Assembly Safety Analysis Report, Drawing Number 219-02-2001, Revision 1
- 11. Transnuclear West Drawing, Dry Shielded Canister Basket-Shell Assembly Safety Analysis Report, Drawing Number 219-02-2002, Revision 1
- 12. Transnuclear West Drawing, Dry Shielded Canister Main Assembly Safety Analysis Report, Drawing Number 219-02-2003, Revision 1
- 13. Babcock & Wilcox Drawing, Filter Canister SAR Information, Drawing Number 1161299, Revision 1
- 14. Babcock & Wilcox Drawing, Fuel Canister SAR Information, Drawing Number 1161300, Revision 3
- 15. Babcock & Wilcox Drawing, Knockout Canister SAR Information, Drawing Number 1161301, Revision 1
- 16. LA-CP-13-00634, MCNP6TM Users Manual, Los Alamos National Laboratory, Version 1.0, May 2013, RSICC Package ID C810MNYCP00
- 17. AREVA Federal Services Calculation, CALC-3012588, Software Dedication Report for MCNP v6.1.00, Revision 0
- 18. U.S. Nuclear Regulatory Commission, License for Independent Storage of Spent Nuclear Fuel and High-Level Radioactive Waste, License No. SNM-2508, Amendment No. 4, June 30, 2005, Docket No. 72-20, NRC Accession Number ML051810406.
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