ML18096A059
| ML18096A059 | |
| Person / Time | |
|---|---|
| Site: | 05200045 |
| Issue date: | 07/23/2018 |
| From: | James Shea NRC/NRO/DNRL |
| To: | |
| Shea J | |
| Shared Package | |
| ML18096A057 | List: |
| References | |
| Download: ML18096A059 (4) | |
Text
9.0 Auxiliary Systems 9.1.5 Overhead Heavy Load Handling Systems 9.1.5.1 Regulatory Criteria In this section the staff reviews and evaluates the applicants proposed changes to the overhead heavy load handling system (OHLHS), which consists of all components and equipment for moving all heavy loads. This includes loads weighing more than one fuel assembly and its handling device - loads greater than 1,000 pounds for the General Electric-Hitachi (GEH)
Advanced Boiling-Water Reactor (ABWR) design. The main emphasis in the ABWR Design Certification (DC) renewal review is on critical load handling where inadvertent operations or equipment malfunctions, separately or in combination, could cause a release of radioactivity, a criticality accident, or an inability to cool fuel within the reactor vessel or spent fuel pool; or could prevent the safe shutdown of the reactor.
A combined license (COL) applicant that references the GEH ABWR DC will incorporate the OHLHS requirements specified for the ABWR design and the COL applicant will implement the applicable ABWR procedures to address regulatory requirements for overhead heavy load handling.
Revision 5 of the ABWR design control document (DCD) was submitted as part of the GEH design certification renewal application (DCRA) in 2010. There was no difference between Revision 5 and Revision 4 of DCD Tier 2, Section 9.1.5, approved as part of the ABWR DC rule in 1997 (10 CFR Part 52, Appendix A). In a letter dated July 20, 2012 (Agencywide Documents Access and Management System Accession No. ML12125A385), the NRC staff identified 28 items for GEHs consideration as part of their application to renew the ABWR DC. The applicant was requested in Item No. 13 to consider adding a commitment to American Society of Mechanical Engineers (ASME) standard NOG-1 as an acceptable approach to meeting NUREG-0554 criteria for the design of OHLHS cranes.
The applicant has proposed changes in Revision 6 of the ABWR DCD submitted in 2016, to update the DCRA to identify ASME NOG-1 as an acceptable approach for a COL applicant to design the OHLHS and meet the design requirements already established in the ABWR DCD.
The applicant also made changes to reflect the elimination of the new fuel storage vault, as discussed in Section 9.1.1 of this safety evaluation report (SER) supplement. These changes do not fall within the definition of a modification. Therefore, in accordance with Title 10 of the Code of Federal Regulations (10 CFR) 52.59(c), these design changes are amendments, as this term is defined in Chapter 1 of this supplement, and will correspondingly be evaluated using the regulations in effect at renewal.
The relevant requirements for this area of review and the associated acceptance criteria are given in Revision 1 of NUREG-0800, Section 9.1.5, Overhead Heavy Load Handling Systems, and are summarized below. Review interfaces with other standard review plan (SRP) sections also can be found in NUREG-0800, Section 9.1.5.I.
- General design criterion (GDC) 1, Quality standards and records, of Appendix A to 10 CFR Part 50, as it relates to the design, fabrication, and testing of structures, systems, and components (SSCs) important to safety to quality standards commensurate with the importance of the safety functions to be performed.
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- GDC 2, Design basis for protection against natural phenomena, as it relates to the ability of structures, equipment, and mechanisms to withstand the effects of earthquakes.
- GDC 4, Environmental and dynamic effects design bases, as it relates to protection of safety-related equipment from the effects of internally-generated missiles (i.e., dropped loads).
Acceptance criteria adequate to meet the above requirements are:
- Acceptance for meeting the relevant aspects of GDC 1, GDC 2, and GDC 4 for heavy load handling cranes is based on NUREG-0554, Single-Failure-Proof Cranes for Nuclear Power Plants.
- ASME NOG-1 is one acceptable approach to meet the requirements of NUREG 0554.
9.1.5.2 Summary of Technical Information In Revision 6 of the ABWR DCD, the applicant proposed the following changes related to the OHLHS:
- DCD Tier 2, Subsection 9.1.5.1, Design Bases, is revised, in part, to state as indicated below (added texts are underlined):
Cranes and hoists are also designed to criteria and guidelines of NUREG-0612, Subsection 5.1.1(7), ANSI B30.2 and CMAA-70 specifications for electrical overhead traveling cranes, including ANSI B30.11, ANSI B30.16, and NUREG-0554 as applicable. For design of Type 1 cranes, ASME NOG-1 is an acceptable approach to meeting NUREG-0554 criteria.
- DCD Tier 2, Subsection 9.1.5.2.1, Reactor Building Crane, is revised, in part, to state as indicated below (added texts are underlined and deleted texts are crossed-out):
The main hook 1.471 MN will be used to lift the concrete shield blocks, drywell head, reactor pressure vessel (RPV) head insulation, RPV head, dryer, separator strongback, RPV head strongback carousel, new-fuel shipping containers, and spent-fuel shipping cask. The orderly placement and movement paths of these components by the R/B crane precludes transport of these heavy loads over the spent fuel storage pool or over the new-fuel storage vault.
Minimum crane coverage includes R/B refueling floor laydown areas, and R/B equipment storage pit. During normal plant operation, the crane will be used to handle new-fuel shipping containers and the spent-fuel shipping casks. Minimum crane coverage must include the new-fuel vault, the R/B equipment hatches, and the spent-fuel cask loading and washdown pits. A description of the refueling procedure can be found in Section 9.1.4.
The R/B crane will be interlocked to prevent movement of heavy loads over 9-2
the spent-fuel storage portion of the spent-fuel storage pool. Since the crane is used for handling large heavy objects over the open reactor, the crane is of Type I design. The R/B crane shall be designed to meet the single-failure-proof requirements of NUREG-0554. For design of Type 1 cranes, ASME NOG-1 is an acceptable approach to meeting NUREG-0554 criteria.
- DCD Tier 2, Table 9.1-6, Reference Codes and Standards, is revised to add a new entry as indicated below:
ASME NOG-1 Rules for Construction of Overhead and Gantry Cranes (Top Running Bridges, Multiple Girder)
- DCD Tier 2, Table 9.1-8, Heavy Load Operation, under the column of Hardware Handling Tasks, is revised, in part, to state as indicated below (added texts are underlined and deleted texts are crossed-out):
Remove inner container and store fuel bundle in new fuel vault rack.
Mmove fuel to new fuel inspection stand, inspect and return to storage and perform inspection.
Move new fuel from vault inspection stand to fuel pool, storage of fuel channel fixtures. Channel new fuel and store. Move channeled fuel and load into reactor core
- DCD Tier 2, Table 1.8-19, Standard Review Plans and Branch Technical Positions Applicable to ABWR, is revised to update SRP 9.1.5 from Revision 0 (issued July 1981) to Revision 1 (issued March 2007).
- DCD Tier 2, Table 1.8-21, Industrial Codes and Standards* Applicable to ABWR, is revised to add a new entry under the heading of American Society of Mechanical Engineers (ASME) as indicated below:
NOG-1 2004 Rules for Construction of Overhead and Gantry Cranes 9.1.5.3 Technical Evaluation The staff reviewed all changes to the OHLHS in the ABWR DCD Revision 6 in accordance with SRP Section 9.1.5, Overhead Heavy Load Handling Systems.
The ABWR DCD originally referenced NUREG-0554, Single Failure Proof Cranes for Nuclear Power Plants, as the established guidance for the design of the reactor building (R/B) crane.
During the staffs review of Revision 4 of the ABWR DCD, referencing NUREG-0554 alone was sufficient to meet acceptance criteria delineated in Revision 0 (issued July 1981) of SRP Section 5. However, in Revision 1 (issued March 2007) of SRP Section 9.1.5, the staff enhanced the guidelines for the design of single-failure-proof cranes by adding the ASME NOG-1-2004 standard, Rules for Construction of Overhead and Gantry Cranes, which provides comprehensive detailed design requirements including information that shows how specific design criteria of NUREG-0554 will be satisfied. In Revision 6 of the ABWR DCD, the applicant adds a reference to ASME NOG-1 as an acceptable approach to meeting NUREG-0554 criteria for the design of the R/B crane. The staff finds the proposed change acceptable.
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The staff also noted that the proposed changes to DCD Tier 2, Subsection 9.1.5.2.1 and Table 9.1-8 include deletion of the new-fuel storage vault from various descriptions of load handling activities involving the use of the R/B crane. In Revision 6 of the ABWR DCD, the applicant proposes a design change which removes the new fuel storage facility from the scope of the ABWR DC. The new fuel, upon receipt at the site, will be stored instead in the spent fuel pool as described in the applicants proposed changes to DCD Subsections 9.1.1, New Fuel Storage. The staffs evaluation of this design change is documented in Section 9.1.1 of this SER supplement. As such, the proposed changes to DCD Tier 2, Subsection 9.1.5 and Table 9.1-8 are only conforming changes; therefore, the staff finds them acceptable.
9.1.5.4 Conclusion Based on the evaluation provided in this SER supplement, the staff concludes that the proposed amendment to the ABWR DCD associated with the addition of ASME NOG-1 as an option for designing the cranes meets the requirements of a GDC 1, GDC 2, and GDC 4 as reviewed by the staff in accordance with the associated SRP acceptance criteria in Revision 1 of Section 9.1.5 of NUREG-0800. The staff also concludes that the conforming changes to DCD Tier 2, Subsection 9.1.5.2.1 and Table 9.1-8, to reflect the elimination of the new fuel storage vault are acceptable.
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