Document: NUREG-0800
Document ID: 96185d4c-1b6a-42fc-8383-9a85fb0e57e4
Document Type: srp
Title: OVERHEAD HEAVY LOAD HANDLING SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380201.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.1.5
CFR Part: 
CFR Title: 

Content:
ed in part on position C.5 of RG 1.13. 4. Acceptance for meeting the relevant aspects of GDC 5 is embodied within the other acceptance criteria. 9.1.5-4 Revision 1 - March 2007 Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 1 requires that SSCs important to safety be designed, fabricated, erected, and tested to quality standards. GDC 1 applies to SRP Section 9.1.5 because it specifies that the OHLHS and equipment in and around the area of the OHLHS should be properly designed, fabricated, and installed to reduce the likelihood of a single failure. A failure that could cause the release of radioactive materials from damaged irradiated fuel, a criticality accident, or damage to essential safe-shutdown equipment could cause unacceptable radiation exposures. These requirements provide assurance that SSCs of the OHLHS will perform their functions safely. 2. GDC 2 requires that SSCs important to safety be designed to resist the effects of natural phenomena like earthquakes. GDC 2 applies to SRP Section 9.1.5 because it specifies the natural phenomenon (i.e., earthquake) that must be considered in the design of the OHLHS. If not considered, an earthquake could overload OHLHS SSCs to the extent that it could cause an unsafe condition (e.g., a dropped heavy load in a critical area). The potential release of radioactive materials from damage to irradiated fuel, a criticality accident, or damage to essential safe-shutdown equipment could cause unacceptable radiation exposures. RG 1.29 position C.2 and Section 2.5 of NUREG-0554 provide guidance for meeting these requirements. These requirements provide assurance that SSCs of the OHLHS will perform their functions safely. 3. GDC 4 requires protection for SSCs important to safety against the effects of internally-generated missiles. GDC 4 applies to SRP Section 9.1.5 because GDC 4