United States Nuclear Regulatory Commission - Protecting People and the Environment

Design-Specific Review Standard (DSRS) for the mPower™ Design - Chapter 3

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NUREG-0800 SRP/DSRS Section No. NUREG-0800 SRP/DSRS Section Title Applicability of NUREG-0800 Section to mPower™ Design Comments/Additional Guidance Documents to be used for Review, etc.
3.2.1
ML12272A013
Seismic Classification C) Modify SRP Section for DSRS  
3.2.2
ML12272A015
System Quality Group Classification C) Modify SRP Section for DSRS  
3.3.1
ML12324A156
Severe Wind Loading C) Modify SRP Section for DSRS This section was formerly entitled "Wind Loads".
3.3.2
ML12324A166
Extreme Wind Loads (Tornado and Hurricane Loads) C) Modify SRP Section for DSRS This section was formerly entitled "Tornado Loads".
3.4.1
ML12312A148
Internal Flood Protection for Onsite Equipment Failure C) Modify SRP Section for DSRS  
3.4.2
ML12324A190
Protection of Structures Against Flood From External Sources C) Modify SRP Section for DSRS This section was formerly entitled "Analysis Procedures".
3.5.1.1
ML12313A158
Internally Generated Missiles (Outside Containment) C) Modify SRP Section for DSRS  
3.5.1.2
ML12313A396
Internally Generated Missiles (Inside Containment) C) Modify SRP Section for DSRS  
3.5.1.3
ML12272A209
Turbine Missiles C) Modify SRP Section for DSRS  
3.5.1.4
ML12313A399
Missiles Generated by Extreme Winds C) Modify SRP Section for DSRS This section was formerly entitled "Missiles Generated by Tornadoes and Extreme Winds"
3.5.1.5
ML12318A151
Site Proximity Missiles (Except Aircraft) C) Modify SRP Section for DSRS  
3.5.1.6
ML12318A198
Aircraft Hazards C) Modify SRP Section for DSRS  
3.5.2
ML12313A457
Structures, Systems, and Components To Be Protected From Externally Generated Missiles C) Modify SRP Section for DSRS  
3.5.3
ML12222A003
Barrier Design Procedures C) Modify SRP Section for DSRS  
3.6.1
ML070550032
Plant Design for Protection Against Postulated Piping Failures in Fluid Systems Outside Containment A) Use SRP Section "as-is" (minor comments) Replace this first sentence of "AREAS OF REVIEW" with the following: The plant design for protection against piping failures outside containment is reviewed to ensure that environmental effects of such failures would not cause the loss of needed functions of safety-related or risk-significant systems and to ensure that the plant could be safely shut down in the event of such failures. An SSC may be classified as:
  1. Safety-related risk-significant
  2. Safety-related non-risk-significant
  3. Non safety-related risk-significant
  4. Nonsafety-related non-risk-significant
The mPowerTM application will include the classification of SSCs, a list of risk-significant SSCs, and a list of RTNSS equipment. Based on this information, the staff will review according to DSRS Section 3.2, SRP Sections 17.4 and 19.3 to confirm the determination of the safety-related and risk-significant SSCs. If the SSC belongs in the first two classifications above or if it is determined as part of the SRP 19.3 "Augmented Design Standard" review that the SSC is RTNSS "B", the review described in this DSRS Section is applied. For the purpose of brevity in this section, the first two categories above and the RTNSS "B" SSCs will be designated as "SSCs subject to protection against piping failures outside containment."
3.6.2
ML12230A013
Determination of Rupture Locations and Dynamic Effects Associated with the Postulated Rupture of Piping C) Modify SRP Section for DSRS  
3.6.3 Leak-Before-Break Evaluation Procedures B) Delete SRP Section for DSRS (N/A)  
3.7.1
ML13099A204
Seismic Design Parameters C) Modify SRP Section for DSRS  
3.7.2
ML13099A205
Seismic System Analysis C) Modify SRP Section for DSRS  
3.7.3
ML13099A209
Seismic Subsystem Analysis C) Modify SRP Section for DSRS  
3.7.4
ML070460349
Seismic Instrumentation A) Use SRP Section "as-is" (minor comments) SRP Section is in the process of an update.
3.8.1 Concrete Containment B) Delete SRP Section for DSRS (N/A)  
3.8.2
ML13099A298
Steel Containment C) Modify SRP Section for DSRS  
3.8.3
ML13099A312
Concrete and Steel Internal Structures of Steel Containments C) Modify SRP Section for DSRS  
3.8.4
ML13099A316
Other Seismic Category I Structures C) Modify SRP Section for DSRS  
3.8.5
ML13099A319
Foundations C) Modify SRP Section for DSRS  
3.9.1
ML12272A018
Special Topics for Mechanical Components C) Modify SRP Section for DSRS  
3.9.2
ML070230008
Dynamic Testing and Analysis of Systems, Components, and Equipment A) Use SRP Section "as-is" (minor comments) SRP Section is in the process of an update.

Additional considerations:
  • ASME Code AG-1-1997 references should be replaced with ASME Code AG-1-2009.
  • GDC 4 of Acceptance Criteria should require SSCs be designed to accommodate the effects of and to be compatible with the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including loss-of-cooling accidents.
  • RG 1.20 provides guidance and not requirements.
  • DG-1163 has been replaced with RG 1.20.
3.9.3
ML070430397
ASME Code Class 1, 2, and 3 Components, Component Supports, and Core Support Structures A) Use SRP Section "as-is" (minor comments) SRP Section is in the process of an update.

Additional consideration:
  • The applicants SAR should include the description of snubber operability assurance program requirements that the snubber manufacturer submits to the purchaser for review and acceptance per ASME OM, ISTD Code.
3.9.4
ML12272A020
Control Rod Drive Systems C) Modify SRP Section for DSRS  
3.9.5
ML12272A077
Reactor Pressure Vessel Internals C) Modify SRP Section for DSRS  
3.9.6
ML12272A217
Functional Design, Qualification, and Inservice Testing Programs for Pumps, Valves, and Dynamic Restraints C) Modify SRP Section for DSRS  
3.9.7 Risk-Informed Inservice Testing of Pumps and Valves B) Delete SRP Section for DSRS (N/A)  
3.9.8 Risk-Informed Inservice Inspection of Piping B) Delete SRP Section for DSRS (N/A)  
3.10
ML070720037
Seismic and Dynamic Qualification of Mechanical and Electrical Equipment A) Use SRP Section "as-is" (minor comments) SRP Section is in the process of an update.

Clarification of terminology SRP 3.10, page 3.10-4, number 3. replace with: "GDC 4 as it relates to qualifying equipment as capable of withstanding the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including loss-of-coolant accidents (LOCAs), as well as dynamic effects (e.g., missiles, pipe whip, and jet impingement forces) that may result from equipment failures and from events and conditions outside the plant."
3.11
ML12277A018
Environmental Qualification of Mechanical and Electrical Equipment C) Modify SRP Section for DSRS  
3.12
ML070040002
ASME Code Class 1, 2, and 3 Piping Systems and Associated Supports Design A) Use SRP Section "as-is" (minor comments) SRP Section is in the process of an update.
3.13
ML12272A214
Threaded Fasteners - ASME Code Class 1, 2, and 3 C) Modify SRP Section for DSRS  
BTP 3-1 Classification of Main Steam Components Other than the Reactor Coolant Pressure Boundary for BWR Plants (Former Section 3.2.2, Appendix A, BTP has been separated into an individual section.) B) Delete SRP Section for DSRS (N/A)  
BTP 3-2 Classification of BWR/6 Main Steam and Feedwater Components Other than the Reactor Coolant Pressure Boundary (Former Section 3.2.2, Appendix B, BTP has been separated into an individual section.) B) Delete SRP Section for DSRS (N/A)  
BTP 3-3
ML070800027
Protection Against Postulated Piping Failures Influid Systems Outside Containment A) Use SRP Section "as-is" (minor comments)  
BTP 3-4
ML12272A102
Postulated Rupture Locations in Fluid System Piping Inside and Outside Containment C) Modify SRP Section for DSRS  
Page Last Reviewed/Updated Tuesday, May 14, 2013