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ASME RA S 1.2 2014

ASME RA S 1.2 2014

$98.04

ASME RA-S-1.2 Severe Accident Progression and Radiological Release (Level 2) PRA Standard for Nuclear Power Plant Applications for Light Water Reactors (LWRs)

Published By Publication Date Number of Pages
ASME 2014 96
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This Standard is limited to analyzing the progression of severe accidents from the onset of core damage through radionuclide release to the environment or a determination that a release to the environment will not occur. It includes the analysis of the various phenomena that occur inside the reactor vessel, the containment structure, and neighboring structures that might participate in the radiological release pathway to the environment. This analysis involves carrying the postulated accident sequences through a probabilistic logic structure such as a containment event tree (CET) (or equivalent) and determining the radionuclide release characteristics (e.g., magnitude and timing) for the various pathways through the CET. This standard includes postulated accident sequences initiated from all modes of reactor operation (at-power, shutdown, and transition states). It also includes accident sequences initiated by internal events and/or external hazards addressed in ASME/ANS RA-Sa-2009, Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications.

PDF Catalog

PDF Pages PDF Title
5 FOREWORD
7 PREPARATION OF TECHNICAL INQUIRIES TO THE JOINT COMMITTEE ON NUCLEAR RISK MANAGEMENT
9 COMMITTEE ROSTERS
CONTRIBUTORS TO THE SEVERE ACCIDENT PROGRESSION AND RADIOLOGICAL RELEASE (LEVEL 2) PRA STANDARD FOR NUCLEAR POWER PLANT APPLICATIONS FOR LIGHT WATER REACTORS (LWRs)
13 1. INTRODUCTION
1.1 Objectives
1.2 Coordination with Other Probabilistic Risk Assessment Standards
1.2.1 Interface with ASME/ANS RA-Sa-2009 and Other Level 1 PRA Standards
1.2.2 Interface with a Level 3 PRA
1.2.3 Compatibility with Large Early Release Frequency Analyses
14 1.3 Scope
15 1.4 PRA Capability Categories
18 1.5 Requirements for the PRA Elements
1.5.1 High-Level Requirements
1.5.2 Supporting Requirements
20 1.6 Risk Assessment Application Process
1.7 Risk Assessment Technical Requirements
1.7.1 Purpose
21 1.7.2 Process Check
1.7.3 Use of Expert Judgment
1.7.3.1 Objective of Using Expert Judgment
1.7.3.2 Identification of the Technical Issue
1.7.3.3 Determination of the Need for Outside Expert Judgment
22 1.7.3.4 Identification of Expert Judgment Process
1.7.3.5 Identification and Selection of Evaluator Experts
1.7.3.6 Identification and Selection of Technical Issue Experts
1.7.3.7 Responsibility for the Expert Judgment
1.7.4 Derivation of PRA Requirements
23 1.7.5 PRA Requirements
1.8 PRA Configuration Control
1.9 Peer Review
1.10 Addressing Multiple Hazards
26 2. ACRONYMS AND DEFINITIONS
2.1 Acronyms
27 2.2 Definitions
37 3. PRA CONFIGURATION CONTROL
3.1 Purpose
3.2 PRA Configuration Control Program
3.3 Monitoring PRA Inputs and Collecting New Information
3.4 PRA Maintenance and Upgrade
38 3.5 Pending Changes
3.6 Use of Computer Codes
3.7 Documentation
39 4. TECHNICAL REQUIREMENTS
4.1 Scope
4.2 Level 1/Level 2 PRA Interface–Accident Sequence Grouping
40 4.2.1 High Level Requirements
4.2.2 Supporting Requirements
47 4.3 Containment Capacity Analysis
4.3.1 High Level Requirements
4.3.2 Supporting Requirements
56 4.4 Severe Accident Progression Analysis
57 4.4.2 Supporting Requirements
62 4.5 Probabilistic Treatment of Accident Progression and Source Terms
4.5.1 High Level Requirements
4.5.2 Supporting Requirements
74 Capability Category I
75 Capability Category I
76 Capability Category I
77 Capability Category I
81 4.6 Source Term Analysis
4.6.1 High Level Requirements
4.6.2 Supporting Requirements
85 4.7 Evaluation and Presentation of Results
86 4.7.1 High Level Requirements
4.7.2 Supporting Requirements
87 4.8 Interface Between Level 2 PRA and Level 3 PRA
4.8.1 High Level Requirements
88 4.8.2 Supporting Requirements
90 5. PEER REVIEW
5.1 Purpose
5.2 Frequency
5.3 Methodology
5.4 Peer Review Team Composition and Qualifications
5.4.1 Collective Team
5.4.2 Individual Team Members
91 5.4.3 Review Team Members for PRA Upgrades
5.4.4 Knowledge of Specific Aspects of the PRA Technical Elements
5.5 Review of PRA Technical Elements to Confirm the Methodology
92 5.6 Expert Judgment
5.7 PRA Configuration Control
5.8 Documentation
5.8.1 Peer Review Team Documentation
93 5.8.2 Resolution of Peer Review Team Comments
95 6. REFERENCES

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