Document: NUREG-0800
Document ID: 5e40cf60-028d-44c3-b9b8-735a6a68a48a
Document Type: srp
Title: Revision 6 - August 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A036.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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Content:
ing budget, and diagnostic and other support modules will not cause the allotted time to be exceeded. Use of Part-Scale Prototypes In systems that have not been implemented and tested on a full scale, expected system delays on scale-up should be calculated and shown to be less than limiting system response times (NUREG/CR-6083, Sections 2.1.3 and 2.1.4). A basis should be provided that describes the effects of adding sensors, divisions, communication links, controllers, computer nodes, or actuation devices required to scale the test system to full scale. Test data should confirm scaling as well as performance projections. Exceptions are considered anomalies or abnormal events. Prototypes designed to demonstrate scaling should include all significant architectural elements plus enough additional elements to show the scaling effects to be measured. 4. Review Procedures Based on review of the available information and applicant/licensee commitments, the reviewer should reach a conclusion appropriate to the level of detail and type of submittal. For certified designs under 10 CFR Part 52, preliminary SARs, or topical reports, the level of detail typically includes only information to verify limiting response times, digital computer timing requirements, architecture, and design commitments. For this level of detail, the reviewer verifies that system timing requirements calculated from the design basis events and other criteria have been allocated to the digital computer portion of the system as appropriate, and have been satisfied in the digital system architectural design. When ITAAC or detailed design documents that describe designs, tests, analyses, or other methods of demonstrating satisfaction of design commitments are available, the reviewer verifies that the installed plant systems perform as predicted and appropriate measurement and analysis techniques have been used to compensate for the uncertainties introduced by certain design and implementation practices,