Document: NUREG-0800
Document ID: 5eb9eb69-3e1a-4815-a65d-fa870db91bee
Document Type: srp
Title: LIGHT LOAD HANDLING SYSTEM AND RELATED REFUELING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1308/ML13085A145.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.1.4
CFR Part: 
CFR Title: 

Content:
nsfers them to other LLHS equipment. The LLHS load with the potential to cause the greatest damage to stored fuel should be identified for the fuel handing accident evaluation. D. The refueling cavity design should include: i. A robust refueling cavity water seal that is built to appropriate engineering codes, and industrial or manufacturing association standards, will not catastrophically fail during a seismic event, and is not vulnerable to a single failure. It should also be protected from dropped objects. ii. An evaluation of all paths capable of inadvertently draining the refueling cavity, the potential for, and consequences of the refueling cavity to drain through these paths (i.e., manways, drain lines, etc.). The design of the 9.1.4-8 Draft Revision 4 – June 2013 cavity should be configured to assure sufficient water will be retained above fuel temporarily placed in the upender or other safe laydown location such that the worst-case draindown scenario will allow operators to add inventory before: (1) the loss of adequate shielding for personnel, (2) postulated boiling of the water, and (3) top of active fuel is reached.. For example, there should be no non-seismic piping or openings below the top of any safe laydown location of the fuel. Note: SRP Section 19.0 evaluates operational assumptions for shutdown risk, for example the use of nozzle dams. iii. Design provisions so that any leakage that occurs is readily identified and corrected. Describe controls that will be established to prevent inadvertent draining of the refueling cavity. Adequate procedures, properly calibrated refueling cavity water level instrumentation, and alarms are considered to be important in the mitigation of any loss-of-cavity-water accident. Operating procedures should address a draindown evolution and periodic maintenance and inspection of the refueling cavity water seal. 4. The SAR information for the light load handling equipment, including equipment storage areas, is reviewed