ML21285A274
| ML21285A274 | |
| Person / Time | |
|---|---|
| Issue date: | 10/12/2021 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| References | |
| RG-1.078, Rev 2 | |
| Download: ML21285A274 (2) | |
Text
Response to Public Comments on Draft Regulatory Guide (DG)-1387 Evaluating the Habitability of a Nuclear Power Plant Control Room during a Postulated Hazardous Chemical Release On July 27th, 2021, the U.S Nuclear Regulatory Commission (NRC) published a notice in the Federal Register (86 FR 40661) that Draft Regulatory Guide, DG-1387, (Proposed Revision 2 Regulatory Guide (RG) 1.78), was available for public comment. The Public Comment period ended on August 27th, 2021. The NRC received comments from the organizations and people listed below. The NRC has combined the comments and NRC staff responses in the following table.
1.Martin Phalen 2. Carrie Fosaaen 3. Barry Quigley Nuclear Energy Institute NuSclae Power, LLC ADAMS Accession No. ML21243A371 ADAMS Accession No. ML21231A192 ADAMS Accession No. ML21243A369 Commenter Section of DG- Specific Comments NRC Resolution 1387 (These are the full comments as provided in each submission)
- 1. Martin General My understanding is that the correct acronym is IDLH The NRC agrees with the comment and has Phalen (Immediately Dangerous to Life and Health) andNOT IDHL. fixed the editorial error.
- 2. Carrie Last paragraph of This appears to be a potentially unintended change from an The NRC agrees with the comment and will use Fosaaen Section 1.2, page "or" statement to an "and" statement: does not exceed the all suggested words and wording for the 9 specified number by traffic type and the total weight less than identified sentences in the Section 1.2. The staff the quantity shown in Table 2. has reworded this paragraph to be consistent with the previous wording in RG 1.78 Revision Change to Revision 1 wording: "Frequent shipments, i.e., 1.
shipments exceeding the specified number by traffic type, need not be considered in the analysis if the quantity of hazardous chemicals is less than the quantity shown in the table in Appendix A (adjusted for the appropriate toxicity limit, meteorology, and control room air exchange rate)."
Version for ACRS use and review prior to final release
Commenter Section of DG- Specific Comments NRC Resolution 1387 (These are the full comments as provided in each submission)
Last paragraph of If original wording from Comment 1 is maintained, the draft Per the resolution of the previous comment, no Section 1.2, page states that mobile sources need not be considered if the response to this comment is needed and no 9 total weight less than the quantity in Table 2. additional changes are necessary.
Change to the total weight is less than Section 3.1 Current guidance states: concentrations exceeding the The NRC agrees with the comment to use Table 1 for longer those in and to replace the in the last sentence of the Section 3.1.
Change to concentrations exceeding those in Table 1 for longer
- 3. Barry Geneal In revision 1, Table 1 for toxicity limits states "This table lists The NRC agrees with the comment: In Section Quigley commonly encountered chemical but thelist is not all- 3.1, the suggested wording This table lists inclusive". This statement does not appear or concept does commonly encountered chemical but the list is not appear in Revision 2. It's exclusion could lead a licensee not all-inclusive" is added. In addition, the staff to conclude that only the 29 chemicals listed require added a pointer to NUREG/CR-6624 which can evaluation; this isless conservative than Revision 1. provide a more complete list of chemicals.
2 Version for ACRS use and review prior to final release