Document: NUREG-0800
Document ID: 51f36446-2ac9-4fa5-a60e-0b36c7db3df2
Document Type: srp
Title: LIGHT LOAD HANDLING SYSTEM (RELATED TO REFUELING)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380200.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.1.4
CFR Part: 
CFR Title: 

Content:
al Standards Institute/American Nuclear Society (ANSI/ANS) 57.1-1992. 4. Acceptance for meeting the relevant aspects of GDC 62 is based in part on ANSI/ANS 57.1-1992. 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 2 requires that SSCs important to safety be designed to resist the effects of natural phenomena like earthquakes. GDC 2 applies to SRP Section 9.1.4 because it specifies the natural phenomenon (i.e., earthquake) that must be considered in the LLHS design. If not considered, an earthquake could overload LLHS SSCs and cause unsafe conditions (e.g., a fuel assembly drop with the potential for a release of radioactive materials from damaged irradiated fuel or criticality accidents) or unacceptable personnel radiation exposures. SRP Section 9.1.4 cites RG 1.29 Position C.1 for safety-related portions and Position C.2 for nonsafety-related design portions. These positions provide guidance for meeting these requirements. This requirement provides assurance that LLHS SSCs will perform their intended function of safely carrying loads that, if dropped, could cause unsafe conditions, keeping personnel exposures to radiation within acceptable limits. 2. GDC 5 requires that SSCs important to safety not be shared among nuclear power units unless such sharing can be shown not to significantly impair their ability to perform safety functions, including, in an accident in one unit, an orderly shutdown and cooldown of the remaining units. GDC 5 requirements ensure LLHS design for essentially independent LLHS SSCs in LLHS shared for use in multiple-unit plants. The shared use in multiple-unit plants, therefore, will not affect the LLHS safety function significantly. SRP Section 9.1.4 provides guidance to meet these requirements. This requirement provides assurance that the LLHS and its SSCs will continue to perform their required