ML18101A005
| ML18101A005 | |
| Person / Time | |
|---|---|
| Issue date: | 04/11/2018 |
| From: | Jonathan Marcano Programmatic Oversight and Regional Support Branch |
| To: | |
| Duvigneaud D | |
| Shared Package | |
| ML18100B106 | List: |
| References | |
| GL-15-001 | |
| Download: ML18101A005 (7) | |
Text
Closure of Generic Letter 2015-01:
Treatment of Natural Phenomena Hazards at Fuel Cycle Facilities Jonathan Marcano, P.E.
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Background
- Fukushima Dai-ichi event in 2011.
(ADAMS Accession No. ML110830824).
(ADAMS Accession No. ML12286A284).
- Inspections identified potential generic issue.
- Unresolved items were issued.
- Generic Letter (GL) 2015-01 issued on June 22, 2015 (ADAMS Accession No. ML14328A029).
- Temporary Instruction 2600/016 to independently verify implementation of licensees responses (ADAMS Accession No. ML15317A506).
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Background (Cont.)
- GL-2015-01 Purpose
- Request information to verify compliance with regulations regarding natural phenomena hazards (NPH).
- Verify that integrated safety analyses (ISAs) address the impacts of natural phenomena events.
- Provisions of 10 CFR 70.62(c)(1) require that:
- Each licensee shall conduct and maintain an ISA.
- ISA identifies potential accident sequences caused by events internal to the facility and credible external events, including natural phenomena.
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Closure of GL 2015-01
- Evaluation of licensee responses
- Conducted significant interactions with stakeholders.
- Issued request for supplemental information.
- Issued Technical Evaluation Reports (TERs).
- Inspections independently verified compliance with applicable regulatory requirements and license conditions regarding the treatment of NPH as described in the licensees responses and respective ISAs.
- Issued closure letter to each licensee 4
Closure of GL 2015-01
- Examples of safety improvements achieved through this effort
- Updates to ISA documentation in order to accurately reflect design and safety information for NPH.
- Adoption of measures in safety programs, like a Configuration Management Program, to carefully evaluate the impacts of facility and design changes on the NPH safety assumptions and items relied on for safety.
- One licensee implemented significant facility modifications for seismic and missile protection.
- Modifications involving piping and equipment supports to improve resiliency against seismic hazards.
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Closure of GL 2015-01
- Additional regulatory activities as a result of this effort:
- Development of Information Notice to inform licensees of recent issues and inspection findings regarding programs and procedures for determining and implementing management measures for isolation controls.
- The staff is in the process of evaluating guidance on seismic hazards. The results of the evaluation will be used to inform the decision to issue or update NRC guidance.
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Conclusion
- GL-2015-01 was an effective mechanism to provide NRC staff the basis for concluding that licensees are in compliance with applicable regulatory requirements related to NPH.
- Closure of GL-2015-01 is an example of a major regulatory effort that yielded significant programmatic accomplishments for the NRCs Fuel Facilities Business Line.
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