ML18016B076

NRC-012 - Staff Presentation Slides - Safety Panel 2 (Jan. 16, 2018)

ML18016B076
Person / Time
Site:	Northwest Medical Isotopes
Issue date:	01/16/2018
From:	NRC/OGC
To:	NRC/OCM
SECY RAS
References
50-609-CP, Construction Permit Mndtry Hrg, RAS 54173
Download: ML18016B076 (9)

Text

Northwest Medical Isotopes Construction Permit Application Review

• Mandatory Hearing (Safety Panel 2)

• January 23, 2018 NRC-012

Panelists

• Michael Balazik

- Project Manager, NRR

• April Smith

- Reliability and Risk Analyst, NMSS

• David Tiktinsky

- Senior Project Manager, NMSS

• James Hammelman

- Senior Chemical Engineer, NMSS 2

Accident Analysis Methodology

• NWMI used an ISA methodology for its accident analyses

• IROFS and management measures to be selected to demonstrate safety

• Consistent with the ISG Augmenting NUREG-1537, radiological and chemical hazards evaluated against consequence criteria in 10 CFR 70.61 3

ISA Methodology

• Northwest submitted an ISA Summary of the accident analysis of radiological and chemical hazards

• ISA Summary contains:

- Hazard analyses results

- Qualitative assessment of likelihood, consequences, and risk category

- Identification of accident sequences 4

ISA Methodology (continued)

• ISA methodology found adequate to identify IROFS to prevent or mitigate accidents and prevent an inadvertent criticality

• Management measures to assure availability and reliability of IROFS will be reviewed in the OL application

• Staff found that ISA process adequate to support identification of hazards and mitigation or prevention of accidents 5

Radiological and Criticality Safety

• PSAR/ISA Summary presented multiple accident sequences involving liquid spills, sprays and leaks with impacts to radiological and criticality safety

• Staff evaluated engineered safety features including items relied on for safety

• Analysis provides reasonable assurance that credible accident sequences have been identified 6

Chemical Safety

• Staff reviewed the design, accident analysis, and proposed safety features

• Staff conducted independent analyses of chemical hazards

• NWMI identified additional chemical safety research and development related to ion exchange system

• Staff concludes that the chemical hazards can be adequately managed 7

Summary of Accident Analysis Findings

• ISA is a sufficient approach to identify accident sequences and IROFS

• Northwest adequately assessed risks to public health and safety for issuance of a construction permit 8

Acronyms

• IROFS - Items relied on for safety

• ISA -

Integrated safety analyses

• PSAR - Preliminary Safety Analysis Report

• NMSS - Office of Nuclear Material Safety and Safeguards

• NRR

- Office of Nuclear Reactor Regulation

• NWMI - Northwest Medical Isotopes 9