Document: NUREG-0800
Document ID: e1169529-d2cb-4947-9efe-b23d927f4aa9
Document Type: srp
Title: NUREG40800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350520.pdf
Revision Date: 2023-06
Chapter: 8
Section ID: 8
CFR Part: 
CFR Title: 

Content:
using the analytical techniques and assumptions of the previous voltage analyses cited in item 3 above, and the measured existing grid voltage and bus loading conditions recorded during conduct of the test, calculate new set of voltages for all the Class 1E buses down to the 120/208 volt level; d) compare the analytically derived voltage values against the test results. With good correlation between the analytical results and the test results, the test verification requirement will be met. That is, the validity of the mathematical model used in performance of the analyses of item 3 will have been established; therefore, the validity of the results of the analyses is also established. In general the test results should not be more than 3% lower than the analytical results; however, the difference between the two when subtracted from the voltage levels determined in the original analyses should never be less than the Class 1E equipment rated voltages. C. REFERENCES 1. General Design Criterion 17, "Electric Power Systems." 8A-15 Rev. 0 - July 1981 2. IEEE Std. 279, "Criteria for Protection Systems for Nuclear Power Stations." 3. Millstone Unit No. 2, Safety Evaluation Supporting Amendment No. 16 to License No. DPR-65. 4. NRC Summary of Meeting for Arkansas Nuclear One Incident of September 16, 1978, dated February 9, 1979. 8SA-16 Rev. 0 - July 1981 Branch Technical Position PSB-2 CRITERIA FOR ALARMS.AND INDICATIONS ASSOCIATED WITH DIESEL-GENERATOR UNIT BYPASSED AND INOPERABLE STATUS 1. BACKGROUND Regulatory Guide 1.47, "Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety Systems," describes an acceptable method for complying with the requirements of IEEE 279, "Criteria for Protection Systems for Nuclear Power Generating Stations," with respect to indicating the bypass or inoperable status of portions of the prot'ection system, systems actuated or controlled by the protection system, and auxiliary or supporting systems that must be operable for the