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MONTHYEARML17193A1882017-07-0101 July 2017 License Amendment Request for Upgrade of the Nuclear Safety System in the Mit Reactor Protection System, Docket No. 50-20, License R-37 Project stage: Request ML17354A0092017-12-14014 December 2017 Massachusetts Institute of Technology (Mit) - Response to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System Project stage: Response to RAI ML18059A2362018-03-12012 March 2018 Massachusetts Institute of Technology - Request for Additional Information for Nuclear Safety System Upgrade License Amendment Request Project stage: RAI ML18120A1152018-04-20020 April 2018 Response to Follow-Up Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the Mit Reactor Project stage: Request ML18128A2002018-05-0303 May 2018 Follow-Up Response Regarding TS 3.2.3 to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the Mit Reactor, License R-37, Docket No. 50-20 Project stage: Request ML18218A4472018-08-30030 August 2018 Massachusetts Institute of Technology - Request for Additional Information for Nuclear Safety System Upgrade License Amendment Request Project stage: RAI ML18317A0552018-10-25025 October 2018 Mit, Submittal of Response to Request for Additional Information for Nuclear Safety System Upgrade License Amendment Request Project stage: Response to RAI ML18345A0542018-12-0606 December 2018 the Massachusetts Institute of Technology - Submittal of Supplement to Response to RAI for Nuclear Safety System Upgrade License Amendment Request (CAC #MF5003, EPID #L-2016-LLA-0003) Project stage: Supplement ML19063A4962019-02-27027 February 2019 Further Follow-Up Response Regarding TS 3.2.3 to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the Mit Reactor, License R-37, Docket No. 50-20 Project stage: Request 2018-03-12
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Category:Letter
MONTHYEARML24199A1082024-07-23023 July 2024 Examination Confirmation Letter No. 50-020/OL-24-02, Massachusetts Institute of Technology ML24052A2102024-06-0606 June 2024 Examination Result Letter No. 50-020/OL-24-01, Massachusetts Institute of Technology ML24127A1012024-04-26026 April 2024 Mit - Update of Professor Ian A. Waitz Named as Mit Vice President for Research ML24127A1002024-04-24024 April 2024 Mit - Proposal for Conversion to Low Enriched Uranium (Leu), Mit Research Reactor ML24094A0482024-03-29029 March 2024 Mit Nuclear Reactor Lab., Annual Report for 2023, Per Technical Specification 7.7.1 ML24081A1642024-03-11011 March 2024 Massachusetts Institute of Technology, NF-0343 & NW-0681 - Submittal of Rescinding Notice of Cancellation ML24022A0972024-01-22022 January 2024 Massachusetts Institute of Technology Change of Facility Backup Project Manager ML23354A1442024-01-0505 January 2024 Examination Confirmation Letter No. 50-020/OL-24-01, Massachusetts Institute of Technology IR 05000020/20232032023-11-21021 November 2023 Massachusetts Institute of Technology - U.S. Nuclear Regulatory Commission Routine Inspection Report No. 05000020/2023203 ML23242A3382023-11-0606 November 2023 Examination Report Letter No. 50-020/OL-23-01, Massachusetts Institute of Technology ML23242A3392023-11-0606 November 2023 Examination Result Letter No. 50-020/OL-23-01, Massachusetts Institute of Technology IR 05000020/20232012023-10-12012 October 2023 Massachusetts Institute of Technology - U.S. Nuclear Regulatory Commission Routine Inspection Report No. 05000020/2023201 IR 05000020/20232022023-09-27027 September 2023 Massachusetts Institute of Technology - U.S. Nuclear Regulatory Commission Security Inspection Report No. 05000020/2023202 ML23194A0412023-07-11011 July 2023 Mit Research Reactor - Duties of Reactor Superintendent ML23103A2632023-05-10010 May 2023 Examination Confirmation Letter No. 50-020/OL-23-01 Massachusetts Institute of Technology ML23094A1102023-03-30030 March 2023 Massachusetts Institute of Technology (Mit), Submittal of Annual Report for 2022, Technical Specification 7.7.1 ML23072A0242023-03-0707 March 2023 Mit, Nuclear Reactor Lab., Proposal for Conversion to Low Enriched Uranium (Leu), Mit Research Reactor IR 05000020/20222012023-02-0707 February 2023 Massachusetts Institute of Technology - U.S. Nuclear Regulatory Commission Routine Inspection Report No. 05000020/2022201 ML22189A0492022-07-25025 July 2022 Examination Confirmation Letter No.50-020/OL-22-02, Massachusetts Institute of Technology ML22095A2412022-03-31031 March 2022 Annual Report for the Mit Research Reactor for the Period from January 1, 2021, to December 31, 2021 ML22062B0422022-02-10010 February 2022 Proposal for Conversion to Low Enriched Uranium (Leu), Mit Research Reactor, Docket No. 50-20, 10 CFR 50.64 (c)(2)(ii) of That Paragraph ML21328A2342021-11-29029 November 2021 Examination Confirmation Letter No. 50-020/OL-22-01, Massachusetts Institute of Technology IR 05000020/20212032021-11-0909 November 2021 Massachusetts Institutes of Technology - U.S. Nuclear Regulatory Commission Routine Inspection Report No. 05000020/2021203 IR 05000020/20212012021-09-30030 September 2021 Massachusetts Institute of Technology - U.S. Nuclear Regulatory Commission Routine Inspection Report 05000020/2021201 ML21186A0032021-07-16016 July 2021 Examination Confirmation Letter No. 50-020/OL-21-02, Massachusetts Institute of Technology ML21165A1542021-05-28028 May 2021 Mit - Emergency Plan and Procedures, 10 CFR 50.54(q)(5) ML21140A3622021-05-17017 May 2021 Massachusetts Institute of Technology (Mit) - Supplement to Response to the Request for Additional Information for Battery Upgrade License Amendment Request (EPID: L-2021 -NFA-0000) ML21132A2512021-05-0606 May 2021 Massachusetts Institute of Technology, License No. R-37, Docket No. 50-20, Reportable Occurrence 50-20/2021-: Operation with Less than the Required Staffing on Site; NRC OPS Center Log EN 55212 ML21112A1672021-04-12012 April 2021 Massachusetts Institute of Technology - Physical Security Plan Revision Regarding Biometric Readers ML21105A3602021-04-0707 April 2021 Duties of Reactor Superintendent ML21099A1132021-03-31031 March 2021 Massachusetts Institute of Technology - Annual Report, Docket No. 50-20, License R-37, Technical Specification 7.7.1 ML21091A2082021-03-24024 March 2021 Mit Nuclear Reactor Lab - Response to Request for Additional Information for Battery Upgrade License Amendment Request ML21076A0232021-03-18018 March 2021 Requests for Additional Information - Related to License Amendment Request to Replace Emergency Power System Batteries ML21070A1852021-03-0202 March 2021 Mit Nuclear Reactor Laboratory, License Amendment Request Regarding Emergency Battery Surveillances in Technical Specification 4.6, Docket No. 50-20, License R-37 ML21063A2552021-02-25025 February 2021 Proposal for Conversion to Low Enriched Uranium (Leu), :Mit Research Reactor, Docket No. 50-20, 10 CFR 50.64 (c)(2)(ii) of That Paragraph ML21053A4372021-02-23023 February 2021 Examination Confirmation Letter No. 50-020/OL-21-01, Massachusetts Institute of Technology ML21036A0852021-02-19019 February 2021 Massachusetts Institute of Technology - Acceptance of License Amendment Request to Revise Surveillance Frequency During Extended Reactor Shutdown ML21035A2582021-01-29029 January 2021 Massachusetts Institute of Technology (Mit), Supplement to Technical Specifications Surveillance Frequency Definition Update for Improved Compliance Under 10 CPR 50.36(c)(3) ML20295A4242020-11-16016 November 2020 Notification of Mailing Address Change Regarding Submittal of Fingerprint Cards ML20307A4202020-11-0505 November 2020 Granting of Extension Request to Supplement License Amendment to Revise Surveillance Requirement Frequency ML20304A1172020-10-19019 October 2020 Time Extension Request for LAR on Technical Specifications Surveillance Frequency Update for Improved Compliance Under 10 CFR 50.36(c)(3) for the Mit Research Reactor ML20248H5682020-09-22022 September 2020 Mit Research Reactor Routine Inspection Report with Enforcement Discretion (EA-20-109) - August 2020 ML20161A3342020-07-24024 July 2020 Massachusetts Institute of Technology - Issuance of Amendment NO.44 to Renewed Facility Operation License No. R-37 to Amend Technical Specifications Related to Level 1 Position Title Change ML20182A7092020-07-0909 July 2020 Acceptance Review Amendment Request to Revise Surveillance Frequency - Opportunity to Supplement ML20192A0762020-06-30030 June 2020 Mit - Supplemental Information for License Amendment Request for Position Title Change in Technical Specifications for Level 1 Staff ML20070H2672020-06-0404 June 2020 Examination Report No. 50-020/OL-20-01, Massachusetts Institute of Technology ML20119A8272020-05-29029 May 2020 Massachusetts Institute of Technology - Issuance of Amendment No. 43 Extending Time to Implement License Amendment No. 42 to Facility Operating License No. R-37 ML20149K4142020-05-27027 May 2020 NRC LAR Extension Supplemental Letter 2020-05-27 ML20135H1882020-05-15015 May 2020 Massachusetts Institute of Technology - Exemption from Select Requirements of 10 CFR Part 55, Operators' Licenses ML20122A0622020-04-21021 April 2020 Massachusetts Institute of Technology, Regarding the, Amendment No. 42 to Renewed Facility Operating License No. R-37 for the Nuclear Safety System Digital Upgrade (Epdi No. L-2016-LLA-0003) 2024-07-23
[Table view] Category:Response to Request for Additional Information (RAI)
MONTHYEARML21140A3622021-05-17017 May 2021 Massachusetts Institute of Technology (Mit) - Supplement to Response to the Request for Additional Information for Battery Upgrade License Amendment Request (EPID: L-2021 -NFA-0000) ML21091A2172021-03-24024 March 2021 Enclosures 5 & 6: Mit Reactor SAR Section 82 Emergency Electrical Power Distribution (Two Pages, Showing Proposed Markups and (Two Pages, Showing Proposed Text Final Version) ML21091A2162021-03-24024 March 2021 Enclosure 4: Hindlepower a Tio Series Microprocessor Controlled Float Battery Charger ML21091A2152021-03-24024 March 2021 Enclosure 3c: Phoenix Broadband Technologies Site Controller Unit PBT-PA-BMS-SC4 ML21091A2142021-03-24024 March 2021 Enclosure 3b: Mit Reactor SAR Figure 8-1 Normal & Emergency Electrical Power Distribution Schematic ML21091A2132021-03-24024 March 2021 Enclosure 3a: Installation and Operating Manual for C&D Technologies Msendur II Batteries (Including previously-submitted Introductory and Part 9 Maintenance Pages) ML21091A2092021-03-24024 March 2021 Enclosure 1: IEEE 1188-2005 Test Reporting Conditions and Results for Tests Performed for Order Number 2516069 at the Reynosa Facility of C&D Technologies ML21091A2112021-03-24024 March 2021 Enclosure 2: C&D Technologies Battery Calculation Report (Five Pages, Including Previously Submitted Rating Table) ML21091A2082021-03-24024 March 2021 Mit Nuclear Reactor Lab - Response to Request for Additional Information for Battery Upgrade License Amendment Request ML19063A4962019-02-27027 February 2019 Further Follow-Up Response Regarding TS 3.2.3 to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the Mit Reactor, License R-37, Docket No. 50-20 ML18345A0542018-12-0606 December 2018 the Massachusetts Institute of Technology - Submittal of Supplement to Response to RAI for Nuclear Safety System Upgrade License Amendment Request (CAC #MF5003, EPID #L-2016-LLA-0003) ML18128A2002018-05-0303 May 2018 Follow-Up Response Regarding TS 3.2.3 to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the Mit Reactor, License R-37, Docket No. 50-20 ML18120A1152018-04-20020 April 2018 Response to Follow-Up Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the Mit Reactor ML17354A0092017-12-14014 December 2017 Massachusetts Institute of Technology (Mit) - Response to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System 2021-05-17
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Text
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MIT NUCLEAR REACTOR LABORATORY AN MIT INTERDEPARTMENTAL CENTER Edward S. Lau Mail Stop: NW12-122 Phone: 617 253-4211 Assistant Director 138 Albany Street Fax: 617 324-0042 Reactor Operations Cambridge, MA 02139 Email: eslaumit.edu 27 February 2019 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn.: Document Control Desk
Subject:
Further Follow-Up Response Regarding TS 3.2.3 to Request for Additional Information for the License Amendment Request to Upgrade the Nuclear Safety System at the MIT Reactor, License R-37, Docket No. 50-20 (CAC No. MF5003)
The Massachusetts Institute of Technology (MIT) hereby submits a follow-up response to the NRC Request for Additional Information (RAI) dated 12 October 2017 on the License Amendment Request (LAR) to upgrade the Nuclear Safety System at the MIT Reactor (MITR).
MIT docketed an initial response to the RAI on 14 December 2017 and a modification on 3 May 2018 specific to the RAI Question #6a response regarding the proposed Technical Specification (TS) 3.2.3 Reactor Protection System. MIT is now providing a further modification to TS 3.2.3.
MIT's 14 December 2017 initial response to Question #6a referenced the response letter's Enclosure S for TS 3.2.3. The modification here to Enclosure S is based on recent discussion with NRC of the proposed TS 3.2.3.
Accordingly, MIT is modifying page 3-20 of TS 3.2.3 as described in the following, which can also be seen in the enclosed document.
- a. Item 13 of Table 3.2.3-1, requiring a scram for "nuclear safety channel in test or fault", is restored as a separate item. With the restored item, this section of the Table is similar to the 12 October 2017 version of the Technical Specification.
However, the column for minimum number required now has "3" instead of "2",
in order to match the other nuclear safety channel requirements (period, neutron flux level, and low count rate), as found in Items 1, 2, and 3 of the Table.
- b. The purpose of restoring Item 13 is to match the surveillance requirements in Items 16 and 17 of Table 4.2-1, in accordance with ANSI/ANS 15.1 Section 4 guidance that a Section 3 Limiting Condition for Operation (LCO) will have "a companion Section 4 surveillance requirement". The Item 13 LCO was therefore restored to Table 3.2.3-1.
- c. The other Items on page 2 of Table 3.2.3-1 were re-numbered to accommodate the re-insertion ofltem 13. There were no other changes to these Items.
TS Table 3.2.3-1 page 3-20 Page2
- d. Footnotes (1) and (5) from page 1 of Table 3.2.3-1 are now duplicated on page 2 of the Table as well, as they are referenced in the restored Line 13. These footnotes continue to be applicable to Item 13:
- Use of a brief but non-zero time limit prevents an instantaneous TS violation, should a malfunction decrease the number of operable nuclear safety channels below three.
- When a trip is present at the Scram Logic Cards, it is visually confirmed by the indicator lights on the LED Scram Display (full name "Safety System Condition LED Scram Display"). The footnote wording was previously clarified so as to avoid reading like a limitation on what types of scrams are included.
- Inoperability of a second channel is explicitly covered, to prevent "rolling 15-minute intervals" from potentially allowing more channels to be inoperable.
- e. None of these changes is expected to have any impact on safety.
The MIT Reactor Safeguards Committee has approved these modifications to the proposed TS 3.2.3.
This RA.I response follow-up and material submitted herewith do not contain any proprietary information. The response contains the following
Enclosure:
Enclosure:
Page 3-20 of Technical Specification 3.2.3 Reactor Protection System, final version and version showing tracked changes from the 3 May 2018 submittal.
Sincerely, Edward S. Lau, NE Assistant Director of Reactor Operations MIT Research Reactor I declare under penalty of perjury that the foregoing is true and correct.
Executedon 07'.§.'1'/~ 0 1'1 * ~
Date S gnature
Enclosure:
As stated.
cc: USNRC - Senior Project Manager Research and Test Reactors Licensing Branch Division of Policy and Rulemaking Office of Nuclear Reactor Regulation USNRC - Senior Reactor Inspector Research and Test Reactors Oversight Branch Division of Policy and Rulemaking Office of Nuclear Reactor Regulation
Table 3.2.3-1 (Continued)
Required Safety Channels I Any Number of Pumps (Two, One, or Zero) I Channel / Parameter Action Setpoint Minimum No.
Required
- 13. )Cl)(S)
Nuclear safety channel in test or fault Scram Channel in test or fault condition
- 14. Building overpressure Scram < 3" water above atmospheric 1
- 15. Main personnel lock gaskets deflated Scram Both gaskets deflated 1
- 16. Basement personnel lock gaskets deflated Scram Both gaskets deflated 1
- 17. Hold-down grid unlatched Scram Grid unlatched 1
- 18. Experiment scrams (As Required by Experiment Approval)
- 1) Nuclear safety scram logic system ensures that reactor scrams when two trips are present simultaneously from any two of the four nuclear safety channels.
- 5) Within 15 minutes of declaring any nuclear safety system channel inoperable, the channel must be placed into a tripped state, which will be indicated on the Safety System Condition LED Scram Display. If any nuclear safety channel is in a tripped state, and a second nuclear safety channel is declared inoperable, then within 15 minutes at least one of the two must be returned to an operable state or the reactor must be shut down.
3-20 14 FEB 2019
Table 3.2.3-1 (Continued)
Required Safety Channels I Any Number of Pumps (Two, One, or Zero) I Channel / Parameter Action Setpoint Minimum No.
Required
- 13. Nuclear safety channel in test or fault Scram Channel in test or fault condition 3(1)(5) 14~. Building overpressure Scram < 3" water above atmospheric 1 154. Main personnel lock gaskets deflated Scram Both gaskets deflated I 16~. Basement personnel lock gaskets deflated Scram Both gaskets deflated l 17~. Hold-down grid unlatched Scram Grid unlatched l 1si. Experiment scrams (As Required by Experiment Approval)
I) Nuclear safety scram logic system ensures that reactor scrams when two trips are present simultaneously from any two of the four nuclear safety channels.
- 5) Within 15 minutes of declaring any nuclear safety system channel inoperable, the channel must be placed into a tripped state, which will be indicated on the Safety System Condition LED Scram Display. If any nuclear safety channel is in a tripped state, and a second nuclear safety channel is declared inoperable, then within 15 minutes at least one of the two must be returned to an operable state or the reactor must be shut down.
3-20 26 APR 2Ql814 FEB 2019 I