ML17068A319
| ML17068A319 | |
| Person / Time | |
|---|---|
| Issue date: | 03/08/2017 |
| From: | O'Driscoll J NRC/NRO/DSRA |
| To: | Bernard Thomas NRC/RES/DE |
| James O'Driscoll | |
| References | |
| RG 1.78 | |
| Download: ML17068A319 (4) | |
Text
From:
O'Driscoll, James Sent:
Wednesday, March 08, 2017 9:19 AM To:
Monninger, John; Jackson, Diane; Thomas, Brian; Penny, Melissa Cc:
Lintz, Mark; Boyce, Tom; Bayssie, Mekonen; Armstrong, Kenneth; Sun, Casper; Haider, Syed
Subject:
RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE (RG) 1.78 March 8, 2016 MEMORANDUM TO: Brian E. Thomas, Director Division of Engineering Office of Nuclear Regulatory Research FROM: John D. Monninger, Director Division of Safety Systems & Risk Assessment Office of New Reactors
SUBJECT:
RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE (RG) 1.78 This memorandum documents the US Nuclear Regulatory Commission (NRC) periodic review of regulatory guide (RG) 1.78, Evaluating the Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release The RG describes guidance on control room habitability during a postulated hazardous chemical release, published in December 2001. As discussed in Management Directive 6.6, Regulatory Guides, the NRC staff reviews RGs approximately every 5 years to ensure that the RGs continue to provide useful guidance. Documentation of the NRC staff review is enclosed.
Based on the results of the periodic review, the staff concludes that a revision to RG 1.78 Revision 1 is warranted. The Office of Nuclear Regulatory Research (RES) Operating Plan lists an action for RES Division of Systems Analysis (RES/DSA) to revise this RG and to submit the draft to RES Division of Engineering Regulatory Guidance and Generic Issues Branch (RES/RGGIB) as part of NRO Research User Need 2011-007.
This memo will be placed in ADAMS. Please let me know if you have any questions.
Enclosure:
Periodic Review of Regulatory Guide 1.78 CONTACT: Jim ODriscoll, NRO/DSRA 301-415-1325 DISTRIBUTION:
Mark Lintz NRO/DEIA/NRCB Tom Boyce, RES/DE/RGGIB
Mekonen Bayssie RES/DE/RGGIB Syed Haider NRO/DSRA/SCVB Kenneth Armstrong NRO/RES/DSA Casper Sun NRO/RES/DSA/RPB Regulatory Guide Periodic Review Regulatory Guide Number: 1.78 Revision number: 1
Title:
Evaluating the Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release Office/division/branch: NRO/DSRA/SCVB Technical Lead: Jim ODriscoll Staff Action Decided: Revise
- 1. What are the known technical or regulatory issues with the current version of the Regulatory Guide (RG)?
Per NRO DSRA memorandum dated August 8, 2011 ML111020652, RG 1.78 Revision 1 endorses the use of HABIT, which is an integrated set of computer codes designed to evaluate CR habitability following a postulated release of toxic chemicals or radioactive materials. Based on the technical reviews of several COL applications and the interaction with contractors over the last couple of years, NRO has concluded that the toxic chemical portion of HABIT would benefit from improvements to become a more useful tool for the staff in performing confirmatory CR habitability toxic gas analyses. NRO has formulated this user need request to RES which includes tasks to improve and benchmark the HABIT code for toxic gas evaluation for CR habitability; and to assess ALOHA to develop insights into its use for toxic gas evaluations. The activities proposed in this user need request lead to regulatory insights into the use of HABIT and ALOHA for CR toxic gas evaluation that would require updating Regulatory Guide 1.78. There is an open action on the RES Operating Plan under this user need request to update RG 1.78 and for RES/DSA to submit the draft RG to RGGIB, as part of Phase III of the project.
- 2. What is the impact on internal and external stakeholders of not updating the RG for the known issues, in terms of anticipated numbers of licensing and inspection activities over the next several years?
Reference NRO User Need memorandum dated August 8, 2011 ML111020652.
- 3. What is an estimate of the level of effort needed to address identified issues in terms of full-time equivalent (FTE) and contractor resources?
Phase 3 of the project has commenced and are expected to be completed in this fiscal year. No additional resources are needed.
- 4. Based on the answers to the questions above, what is the staff action for this guide (Reviewed with no issues identified, Reviewed with issues identified for future consideration, Revise, or Withdraw)?
RES/DSA to complete remaining actions under NRO User need 2011-007, and submit the draft RG to RES/RGGIB per the open action in the RES Operating Plan.
- 5. Provide a conceptual plan and timeframe to address the issues identified during the review.
Reference open actions under NRO-2011-007 in the RES User Need and Operating Plan.
Reference
- 1. Memorandum, User-Need Request For The Office Of Nuclear Regulatory Research To Improve And Benchmark The Control Room Habitability Package Code and Assess The Areal Locations Of Hazardous Atmospheres Code For Control Room Habitability U.S. Nuclear Regulatory Commission, August 2011, ADAMS Accession No. ML111020652.
NOTE: This review was conducted in March 2017, and reflects the staffs plans as of that date. These plans are tentative and are subject to change.
From: Monninger, John Sent: Tuesday, March 07, 2017 8:06 PM To: Jackson, Diane <Diane.Jackson@nrc.gov>; O'Driscoll, James <James.O'Driscoll@nrc.gov>
Subject:
RE: ACTION: YT-2017-0047 - Request for Periodic Review of Regulatory Guides Thanks Jim and Diane.
I have reviewed and concurred. I agree with the plan for transmittal. Do you want to send the email to Brian Thomas or do you send it? Im fine either way.
From: Jackson, Diane Sent: Monday, March 06, 2017 2:54 PM To: Monninger, John <John.Monninger@nrc.gov>; O'Driscoll, James <James.O'Driscoll@nrc.gov>
Subject:
FW: ACTION: YT-2017-0047 - Request for Periodic Review of Regulatory Guides Importance: High John and Jim-I have reviewed Jims proposal and agree. A big thank you to Jim for pro-actively drafting the response.
I support the approach and concur on this reply.
Diane
Diane Jackson Chief, Containment and Ventilation Branch (SCVB)
Division of Safety Systems and Risk Assessment (DSRA), Office of New Reactors US Nuclear Regulatory Commission