ML14245A454

Draft Regulatory Guide DG-1317, Wide-Range Spent Fuel Pool Level Instrumentation

ML14245A454
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Issue date:	11/30/2015
From:	Orr M P NRC/RES/DE/RGDB
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Orr M P
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ML14245A448	List: ML14245A454
References
DG-1317, JLD-ISG-2012-03, NRC Order EA-12-049 RG-1.227
Download: ML14245A454 (11)

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U.S. NUCLEAR REGULATORY COMMISSION November 2015 OFFICE OF NUCLEAR REGULATORY RESEARCH Division 1 DRAFT REGULATORY GUIDE Technical Lead Eric Bowman This regulatory guide is being issued in draft form to involve the public in the early stages of the development of a staff guidance position in this area. It has not received final NRC review or approval and does not represent an official NRC final position. Public comments are being solicited on this draft guide (including any implementation schedule) and its associated regulatory analysis or value/impact statement. Comments should be accompanied by appropriate supporting data. Written comments may be submitted to the Rules, Announcements, and Directives Branch, Office of Administration, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001; submitted through the NRC's interactive rulemaking Web page at http://www.nrc.gov; or faxed to (301) 492-3446. Copies of comments received may be examined at the NRC's Public Document Room, 11555 Rockville Pike, Rockville, MD. Comments would be most helpful if received within 90 days after publication of the request for comment in the Federal Register. Electronic copies of this draft regulatory guide are available through the NRC's interactive rulemaking Web page (see above); the NRC's public Web site under Draft Regulatory Guides in the Regulatory Guides document collection of the NRC Library at http://www.nrc.gov/reading-rm/doc-collections/; and the NRC's Agencywide Documents Access and Management System (ADAMS) at http://www.nrc.gov/reading-rm/adams.html, under Accession No. ML14245A454. The regulatory analysis may be found in ADAMS under Accession No. ML15049A212. DRAFT REGULATORY GUIDE DG-1317 (Proposed New Regulatory Guide 1.227) WIDE-RANGE SPENT FUEL POOL LEVEL INSTRUMENTATION A. INTRODUCTION Purpose This regulatory guide (RG) identifies methods and procedures the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable for demonstrating compliance with NRC regulations to provide a reliable means to remotely monitor wide-range spent fuel pool levels to support implementation of event mitigation and recovery actions as required by Section 50.155, "Mitigation of Beyond-Design-Basis Events," of Title 10 of the Code of Federal Regulations (10 CFR 50.155) (Ref. 1). This RG endorses, with exceptions and clarifications, the methods and procedures promulgated by the Nuclear Energy Institute (NEI) in document NEI 12-02, "Industry Guidance for Compliance with NRC Order EA-12-051, 'To Modify Licenses with Regard to Reliable Spent Fuel Pool Instrumentation'," Revision 1 (NEI 12-02) dated August 2012 (Ref. 2) as a process the NRC staff considers acceptable for meeting certain regulations in 10 CFR 50.155.

Applicable Orders and Regulations

• NRC Order EA-12-049, "Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events," issued March 12, 2012 (Ref. 3). This order requires all nuclear power reactor licensees and construction permit (CP) holders to develop, implement, and maintain strategies to maintain or restore core cooling, spent fuel pool (SFP) cooling, and containment following a beyond-design-basis external event

• NRC Order EA-12-051, "Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation" issued March 12, 2012 (Ref. 4). This order requires nuclear power reactor DG-1317, Page 2 licensees and CP holders to provide safety enhancements in the form of reliable wide-range SFP instrumentation for beyond-design-basis events.

• General Design Criterion 4, "Environmental and Dynamic Effects Design Bases," of Appendix A, "General Design Criteria for Nuclear Power Plants," to Part 50, "Domestic Licensing of Production and Utilization Facilities," of Title 10 of the Code of Federal Regulations (10 CFR Part 50), requires that structures, systems, and components important to safety must be designed to accommodate the effects of environmental conditions [i.e., remain functional under postulated design-basis events (DBEs)]. General Design Criteria 1, 2, 4, and 23 of Appendix A, to 10 CFR Part 50 contain additional general requirements.

• 10 CFR 50.54(hh)(2) requires each licensee to develop and implement guidance and strategies intended to maintain or restore core cooling, containment, and SFP cooling capabilities under the circumstances associated with loss of large areas of the plant due to explosions or fire.

• 10 CFR 50.63, "Loss of All Alternating Current Power," requires all power reactor licensees to be able to withstand and recover from a station blackout of specific duration.

• 10 CFR 50.155(b)(1), "Mitigation of Beyond-Design-Basis Events," requires nuclear power reactor licensees to develop, implement, and maintain strategies to maintain or restore core cooling, SFP cooling, and containment following a beyond-design-basis external event. Related Guidance

• JLD-ISG-2012-01, "Compliance with Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events," (Ref. 5). This interim staff guidance (ISG) endorses, with exceptions and clarifications, the methodologies described in NEI guidance document NEI 12-06, "Diverse and Flexible Coping Strategies (FLEX) Implementation Guide" (Ref. 6) as one method of demonstrating compliance with NRC Order EA-12-049. Draft regulatory guide (DG)-1301 (proposed RG 1.226), "Flexible Mitigation Strategies for Beyond-Design-Basis Events" (Ref. 7) is planned to supersede and replace JLD-ISG-2012-01.

• JLD-ISG-2012-03, "Compliance with Order EA-12-051, Reliable Spent Fuel Pool Instrumentation," (Ref. 8) endorses, with exceptions and clarifications, Rev. 1 of NEI document NEI 12-02, as one method of demonstrating compliance with NRC Order EA-12-051. JLD-ISG-2012-03 is superseded and replaced by this RG.

• RG 1.155, "Station Blackout," describes methods acceptable to the NRC staff for complying with the requirements in 10 CFR 50.63, "Loss of All Alternating Current Power" to cope with a station blackout for specified duration (Ref. 8).

Purpose of Regulatory Guides The NRC issues RGs to describe to the public methods that the staff considers acceptable for use in implementing specific parts of the agency's regulations, to explain techniques that the staff uses in evaluating specific problems or postulated accidents, and to provide guidance to applicants. Regulatory guides are not substitutes for regulations and compliance with them is not required. Methods and solutions that differ from those set forth in RGs will be deemed acceptable if they provide a basis for the findings required for the issuance or continuance of a permit or license by the Commission.

DG-1317, Page 3 Paperwork Reduction Act This RG contains information collection requirements covered by 10 CFR Part 50 and 10 CFR Part 52 that the Office of Management and Budget (OMB) approved under OMB control number 3150-0011 and 3150-0151, respectively. The NRC may neither conduct nor sponsor, and a person is not required to respond to, an information collection request or requirement unless the requesting document displays a currently valid OMB control number.

B. DISCUSSION Reason for Issuance One of the lessons learned from the events at Fukushima Dai-ichi was the significance of the challenge presented by a loss of safety-related systems following the occurrence of a beyond-design-basis external event. In the case of Fukushima Dai-ichi, operators were distracted due to concerns associated with spent fuel pool cooling and potential loss of pool integrity, and this distraction adversely impacted mitigation efforts. The wide-range spent fuel pool level instrumentation required by Order EA-12-051 is intended to avoid such distraction and enable effective prioritization of event mitigation resources and recovery actions.

As one method of addressing these challenges, this RG endorses the processes in the NEI 12-02, Revision 1 as acceptable for use by licensees to provide enhancements in the form of wide-range spent fuel pool level instrumentation for beyond-design-basis events.

Background Following the March 11, 2011 events at the Fukushima Dai-ichi nuclear power plant, the NRC established a senior-level agency task force referred to as the Near-Term Task Force (NTTF). The NTTF undertook a systematic and methodical review of the NRC regulations and processes to determine if the agency should make additional improvements to these programs in light of the events at Fukushima Dai-ichi. As a result of this review, the NTTF developed a comprehensive set of recommendations, documented in SECY-11-0093, "Near-Term Report and Recommendations for Agency Actions Following the Events in Japan," dated July 12, 2011 (Ref. 10). The Commission then directed the NRC staff in staff requirements memorandum (SRM) for SECY-11-0093 to identify any actions that could, and in the staff's judgment should, be taken in the near term given consideration to the wide range of tools available. The staff's response to this Commission direction is contained in SECY-11-0124, "Recommended Actions to be Taken without Delay from the Near-Term Task Force Report," dated September 9, 2011(Ref. 11). Further, in SRM-SECY-11-0093, the Commission directed that all the regulatory actions in the NTTF report should be prioritized, and SECY-11-0137, "Prioritization of Recommended Actions to be Taken in Response to Fukushima Lessons Learned," dated October 3, 2012 (Ref. 12) provides the staff's response to this direction.

As discussed in the SRM for SECY-12-0025, "Proposed Orders and Requests for Information in Response to Lessons Learned from Japan's March 11, 2011, Great Tohoku Earthquake and Tsunami" (Ref. 13), dated March 9, 2012, the Commission determined that the additional requirements in Order EA-12-051 represent "-a significant enhancement to the protection of public health and safety and is an appropriate response to the insights from the Fukushima Dai-ichi accident." The Commission decided that it did not have sufficient information at the time to complete a full backfit analysis of the wide-range spent fuel pool level instrumentation that would be required by the Order. Therefore, the Commission DG-1317, Page 4 decided to administratively exempt this Order from applicable provisions of 10 CFR 50.109, "Backfitting" and the issue finality requirements in 10 CFR Part 52, "Licenses, Certifications, and Approvals for Nuclear Power Plants." (Ref. 14) Numerous public meetings (Ref. 15) were held to receive stakeholder input on the NTTF recommendation associated with enhanced SFP instrumentation both before and after the issuance of Order EA-12-051. On May 31, 2012, the NEI submitted NEI 12-02, Revision B (Ref. 16) for review by the NRC staff. In response to comments from the NRC staff and the public, NEI revised the guidance document and submitted Revision 1 of NEI 12-02 in August 2012. The NRC staff has reviewed NEI 12-02, Revision 1 dated August 2012 and endorses it, with some clarifications and exceptions, as an acceptable method for demonstrating compliance with NRC Order EA-12-051 and the regulations in 10 CFR 50.155(c)(4).

The regulations in 10 CFR 50.155(c)(4) make the requirements of NRC Order EA-12-051 generically applicable. These regulations require that licensees install reliable means of remotely monitoring wide-range SFP levels to support effective prioritization of event mitigation and recovery actions in the event of a beyond-design-basis external event. The SFP level instrumentation currently at nuclear power plants in the United States is typically narrow range and, therefore, only capable of monitoring normal and slightly off-normal conditions. The staff's review of the events at Fukushima Dai-ichi has shown the benefits that can be derived from the availability of more diverse instrumentation. Reliable and available indication is essential to ensure plant personnel can effectively prioritize emergency actions during and after extreme natural events.

External Documents Endorsed in This Guide This RG endorses, in part, the use of one or more codes, standards, or guidance documents developed by external organizations. These codes, standards and third party guidance documents may contain references to other codes, standards or third party guidance documents ("secondary references"). If a secondary reference has itself been incorporated by reference into NRC regulations as a requirement, then licensees and applicants must comply with that standard as set forth in the regulation. If the secondary reference has been endorsed in an RG as an acceptable approach for meeting an NRC requirement, then the standard constitutes a method acceptable to the NRC staff for meeting that regulatory requirement as described in the specific RG. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in an RG, then the secondary reference is neither a legally-binding requirement nor a "generic" NRC approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements.

Harmonization with International Standards The International Atomic Energy Agency (IAEA) has established a series of technical reports, safety guides and standards constituting a high level of safety for protecting people and the environment. IAEA guides present international good practices and identify best practices to help users striving to achieve high levels of safety. As part of their response to the events at Fukushima Dai-ichi the IAEA prepared a technical report titled "Accident Monitoring Systems for Nuclear Power Plants" dated February 2015 (Ref. 17). This RG and the NEI technical document endorsed by it contain guidance about accident monitoring and response systems similar to the discussion in IAEA technical report.

DG-1317, Page 5 C. STAFF REGULATORY GUIDANCE This RG endorses, with the exceptions and clarifications identified in this section, the methods described in NEI 12-02, Revision 1, dated August 2012. The NRC staff has determined that the methods described in the NEI document constitute procedures and processes generally acceptable to the NRC staff for demonstrating compliance with the regulatory requirements for reliable wide-range SFP instrumentation in 10 CFR 50.155. Licensees may use methods other than those provided in NEI 12-02, Revision 1, to meet the regulatory requirements for reliable wide-range SFP instrumentation. The NRC staff will review such methods and determine their acceptability on a case-by-case basis. Except in those cases in which a licensee proposes an acceptable alternative method for complying with these regulations, the NRC staff will use the methods described in this RG to evaluate licensee compliance with the applicable regulations. 1. Introduction Section 1 of NEI 12-02, Rev. 1 provides a brief history of the events at Fukushima Dai-ichi nuclear power plant and the issuing of NRC Order EA-12-051 for reliable, wide-range SFP instrumentation.

Staff Position: The staff has no exceptions or clarifications for Section 1 of NEI 12-02, Rev. 1. 2. Levels of Required Monitoring Section 2 of NEI 12-02, Rev. 1 describes the 3 critical levels in the SFP that must be monitored to demonstrate compliance with the regulations.

Staff Position: The staff has no exceptions or clarifications for Section 2 of NEI 12-02, Rev. 1.

3. Instrumentation Design Features Section 3 of NEI 12-02, Rev. 1 describes the types of instruments that can be used to monitor the SFP water level, their arrangement, mounting, qualification, accuracy, and testing.

Staff Position: The staff has the following exceptions and clarifications for Section 3.4, "Qualification" of NEI 12-02, Rev. 1:

3.4 Qualification - Guidance The second bullet under subheading "Guidance" states that "-instrument channel reliability shall be demonstrated-" for the "-effects of shock and vibration on instrument channel components used during any applicable event for only installed components-"

Staff Position: The demonstration of reliability applies to the "effects of shock and vibration on instrument channel components used during and following any applicable event for installed components."

Regardless of plant design basis, components of the instrument channels should be qualified for shock and vibration using one or more of the following methods:

DG-1317, Page 6

• components are supplied by manufacturers using commercial quality programs (such as ISO 9001, "Quality Management Systems - Requirements" [Ref. 18]) with shock and vibration requirements included in the purchase specification at levels commensurate with portable hand-held device or transportation applications;

• components have a substantial history of operational reliability in environments with significant shock and vibration loading, such as portable hand-held device or transportation applications; or

• components are inherently resistant to shock and vibration loadings, such as cables.

Instrument channel reliability should be demonstrated via an appropriate combination of design, analyses, operating experience, and/or testing of channel components for the effects of shock and vibration on all instrument channel components, rather than only installed components. This exception is needed to strengthen the guidance in NEI 12-02, Rev. 1 by recommending that portable instrument channel components should be designed as hand-held devices or similar rugged components. Additionally, this clarification is intended to remove the potential confusion regarding the extent of design basis shock and vibration loadings that may be different from the design basis seismic loadings. The paragraph after the third bullet under the subheading "Guidance" in section 3.4 of NEI 12-02 states, in part, "Readily available commercial components shall be considered." (emphasis added)

Staff Position: Commercial components may be considered, but the licensee may consider using augmented quality components, up to and including the quality and capability of components typically used in safety-related applications.

3.4 Qualification - Seismic The first bullet under the section "Seismic" in section 3.4 of NEI 12-02 makes a provision for "-instrument channel components- supplied by manufacturers with commercial quality programs- with seismic requirements- and commercial design and testing for operation in environments where significant seismic effects are common." Staff Position: The guidance in this clause does not adequately address seismic levels and frequencies seen at the installation location or methods for demonstration. Demonstration of seismic motion consistent with that of existing design basis loads at the installed location is adequate. Quality programs are addressed in Appendix A-1 of NEI 12-02, Revision 1.

The second bullet under the subheading "Seismic" in section 3.4 of NEI 12-02 makes a provision for demonstrating adequacy of design and installation to account for seismic effects which includes "-substantial history of operational reliability in environments with significant vibration."

DG-1317, Page 7 Staff Position: Typically, vibration is an effect that occurs at higher frequency and lower amplitude than that of seismic motion. Consequently, seismic design and installation adequacy cannot be reasonably demonstrated solely through operational history of performance of components when subjected to vibration. The effects of low frequency, high acceleration need to be included in any demonstration of seismic design adequacy. This clause is not appropriate without stating that such a vibration design envelope shall be inclusive of the effects of seismic motion imparted to the components proposed at the location of the proposed installation.

The third bullet under the section "Seismic" lists four methods of demonstrating reliability. Staff Position: The adequacy of seismic design and installation should be demonstrated based on the guidance in Sections 7, 8, 9, and 10 of IEEE Standard 344-2004 or a substantially similar industrial standard. The use of IEEE Standard 344-2004 is endorsed by Rev. 3 of RG 1.100, "Seismic Qualification of Electric and Mechanical Equipment for Nuclear Power Plants," (Ref. 19).

The NRC staff has no additional exceptions or clarifications for other sections of NEI 12-02, Rev. 1.

D. IMPLEMENTATION. The purpose of this section is to provide information on how applicants and licensees1 may use this guide and information regarding the NRC's plans for using this RG. In addition, it describes how the NRC staff complies with the Backfit Rule found in 10 CFR 50.109(a)(1) or any applicable finality provisions in 10 CFR Part 52.

Use by Applicants and Licensees Applicants and licensees may voluntarily2 use the guidance in this document to demonstrate compliance with the underlying NRC regulations. Methods or solutions that differ from those described in this RG may be deemed acceptable if they provide sufficient basis and information for the NRC staff to verify that the proposed alternative demonstrates compliance with the appropriate NRC regulations. Current licensees may continue to use guidance the NRC found acceptable for complying with the identified requirements as long as their current licensing basis remains unchanged. Licensees may use the information in this RG for actions that do not require NRC review and approval. Licensees may use the information in this RG or applicable parts to resolve regulatory or inspection issues.

1 In this section, "licensees" refers to holders of, and "applicants" refers to applicants for, the following: (1) licenses for nuclear power plants under 10 CFR Parts 50 and 52; and (2) construction permits for nuclear power plants under 10 CFR Part 50. 2 In this section, "voluntary" and "voluntarily" means that the licensee is seeking the action of its own accord, without the force of a legally binding requirement or an NRC representation of further licensing or enforcement action.

DG-1317, Page 8 Use by NRC Staff The NRC staff does not intend or approve any imposition or backfitting of the guidance in this RG. The NRC staff does not expect any existing licensee to use or commit to using the guidance in this RG, unless the licensee makes a change to its licensing basis. The NRC staff does not expect or plan to request licensees to voluntarily adopt this RG to resolve a generic regulatory issue. The NRC staff does not expect or plan to initiate NRC regulatory action that would require the use of this RG. Examples of such unplanned NRC regulatory actions include issuance of an order requiring the use of the RG, generic communication, or promulgation of a rule requiring the use of this RG without further backfit consideration.

During regulatory discussions on plant specific operational issues, the staff may discuss with licensees various actions consistent with staff positions in this RG, as one acceptable means of meeting the underlying NRC regulatory requirement. Such discussions would not ordinarily be considered backfitting. However, unless this RG is part of the licensing basis for a facility, the staff may not represent to the licensee that the licensee's failure to comply with the positions in this RG constitutes a violation.

If an existing licensee voluntarily seeks a license amendment or change and (1) the NRC staff's consideration of the request involves a regulatory issue directly relevant to this RG and (2) the specific subject matter of this RG is an essential consideration in the staff's determination of the acceptability of the licensee's request, then the staff may request that the licensee either follow the guidance in this RG or provide an equivalent alternative process that demonstrates compliance with the underlying NRC regulatory requirements. This is not considered backfitting as defined in 10 CFR 50.109(a)(1) or a violation of any applicable finality provisions in 10 CFR Part 52. If a licensee believes that the NRC is either using this RG or requesting or requiring the licensee to implement the methods or processes in this RG in a manner inconsistent with the discussion in this Implementation section, then the licensee may file a backfit appeal with the NRC in accordance with the guidance in NUREG-1409, "Backfitting Guidelines," (Ref. 20) and the NRC Management Directive 8.4, "Management of Facility-Specific Backfitting and Information Collection" (Ref. 21).

DG-1317, Page 9 REFERENCES3 1. U.S. Code of Federal Regulations (CFR), "Domestic Licensing of Production and Utilization Facilities," Part 50, Chapter 1, Title 10, "Energy."

2. Nuclear Energy Institute (NEI) document NEI 12-02, "Industry Guidance for Compliance with NRC Order EA-12-051, 'To Modify Licenses with Regard to Reliable Spent Fuel Pool Instrumentation", Revision 1, dated August 2012, Washington, DC. (ADAMS Accession No. ML12240A307)4

3. U.S. Nuclear Regulatory Commission (NRC) Order EA-12-049, "Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events," dated March 12, 2012, Washington, DC. (ADAMS Accession No. ML12054A736). 4. NRC, Order EA-12-051, "Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation," issued March 12, 2012, Washington, DC. (ADAMS Accession No.

ML12056A044) 5. NRC, JLD-ISG-2012-01, "Compliance with Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigating Strategies for Beyond-Design-Basis External Events," Revision 0, Issued August 29, 2013, NRC, Washington, DC. (ADAMS Accession No.

ML12229A174) 6. NEI document NEI 12-06, "Diverse and Flexible Coping Strategies (FLEX) Implementation Guide," Revision 0, August 21, 2012 (ADAMS Accession No. ML12242A378)

7. NRC, Draft Regulatory Guide (DG)-1301 (Proposed Regulatory Guide [RG] 1.226) "Flexible Mitigation Strategies for Beyond-Design-Basis Events," Washington, DC. (ADAMS Accession No. ML13168A031) 8. NRC, JLD-ISG-2012-03, "Compliance with Order EA-12-051, Reliable Spent Fuel Pool Instrumentation," Revision 0, Issued August 29, 2012, NRC, Washington, DC. (ADAMS Accession No. ML12221A339) 9. NRC, RG 1.155, "Station Blackout," Washington, DC.

10. NRC, SECY-11-0093, "Recommendations for Enhancing Reactor Safety in the 21st Century, the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated July 12, 2011, Washington, DC. (ADAMS Accession No. ML11186A950) 3 Publicly available documents from the U.S. Nuclear Regulatory Commission (NRC) are available electronically through the NRC Library on the NRC's public Web site at http://www.nrc.gov/reading-rm/doc-collections/. The documents can also be viewed on-line for free or printed for a fee in the NRC's Public Document Room (PDR) at 11555 Rockville Pike, Rockville, MD; the mailing address is USNRC PDR, Washington, DC 20555; telephone (301) 415-4737 or (800) 397-4209; fax (301) 415 3548; and e-mail pdr.resource@nrc.gov. 4 Publications from the Nuclear Energy Institute (NEI) are available at their Web site: http://www.nei.org/ or by contacting the headquarters at Nuclear Energy Institute, 1776 I Street NW, Washington DC 20006-3708, Phone: 202-739-800, Fax 202-785-4019.

DG-1317, Page 10 11. NRC, SECY-11-0124, "Recommended Actions to be Taken without Delay from the Near-Term Task Force Report," dated September 9, 2011, Washington, DC. (ADAMS Accession No.

ML11245A158) 12. NRC, SECY-11-0137, "Prioritization of Recommended Actions to be Taken in Response to Fukushima Lessons Learned," dated October 3, 2011, Washington, DC. (ADAMS Accession No. ML11272A111)

13. NRC, SRM-SECY-12-0025, "Staff Requirements - SECY-12-0025 - Proposed Orders and Requests for Information in Response to Lessons Learned from Japan's March 11, 2011, Great Tohoku Earthquake and Tsunami," dated March 9, 2012, Washington, DC. (ADAMS Accession No. ML120690347)

14. CFR, Title 10, Energy, Part 52, "Licenses, Certifications, and Approvals for Nuclear Power Plants" 15. NRC, Public Meetings, Review of NRC Order EA-12-051, Washington, DC - - - December 1, 2011 (ADAMS Accession No. ML11341A160)

- - - December 15, 2011 (ADAMS Accession No. ML11356A061) - - - January 13, 2012 (ADAMS Accession No. ML11362A202) - - - January 19, 2012 (ADAMS Accession No. ML11361A043)

- - - March 29, 2012 (ADAMS Accession No. ML12073A077) - - - April 10, 2012 (ADAMS Accession No. ML12082A028)

- - - April 18, 2012 (ADAMS Accession No. ML12093A409)

- - - May 1, 2012 (ADAMS Accession No. ML12142A009) - - - June 20, 2012 ACRS subcommittee presentation transcript (ADAMS Accession No. ML121850321) - - - July 11, 2012 ACRS full committee presentation (ADAMS Accession No. ML12213A606) - - - June 21, 2012 (ADAMS Accession No. ML12177A026)

- - - July 25, 2012 Conference Call (ADAMS Accession No. ML12227A481) - - - August 14, 2012 (ADAMS Accession No. ML12223A058) - - - August 23, 2012 (ADAMS Accession No. ML122557A342)

16. NEI, document 12-02, "Industry Guidance for Compliance with NRC Order EA-12-051, 'To Modify Licenses with Regard to Reliable Spent Fuel Pool Instrumentation,'" Revision B, dated May 11, 2012, Washington, DC. (ADAMS Accession No. ML12135A414) 17. International Atomic Energy Agency (IAEA), IAEA Technical Report No. NP-T-3.6, "Accident Monitoring Systems for Nuclear Power Plants," dated February 2015, IAEA, Vienna, Austria,5 18. International Organization for Standardization (ISO), ISO 9001, "Quality Management Systems - Requirements," Geneva, Switzerland. 6 5 Copies of International Atomic Energy Agency (IAEA) documents may be obtained through their Web site: WWW.IAEA.Org/ or by writing the International Atomic Energy Agency P.O. Box 100 Wagramer Strasse 5, A-1400 Vienna, Austria. Telephone (+431) 2600-0, Fax (+431) 2600-7, or E-Mail at Official.Mail@IAEA.Org 6 Copies of International Organization for Standardization (ISO) documents may be obtained by writing to the International Organization for Standardization, 1, ch. de la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, Telephone: +41 22 749 01 11, Fax: +41 22 749 09 47, by E-mail at sales@iso.org, or on-line at the ISO Store Web site: http://www.iso.org/iso/store.htm.

DG-1317, Page 11 19. NRC, RG 1.100, "Seismic Qualification of Electric and Mechanical Equipment for Nuclear Power Plants," Washington, DC.

20. NRC, NUREG 1409, "Backfitting Guidelines," July 1990, Washington, DC. (ADAMS Accession No. ML032230247)

21. NRC, Management Directive 8.4, "Management of Facility specific Backfitting and Information Collection," Washington, DC.