Document: NRC Regulatory Guide
Document ID: 4a45938b-46f4-4b26-9191-2914fcf357f1
Document Type: regulatory_guide
Title: Inservice Inspection of Pressurized Water Reactor Steam Generator Tubes (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740256.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.83
CFR Part: 
CFR Title: 

Content:
esting should be designed so that operators may be shielded or the equipment may be operated remotely to limit operator exposure to radiation. h. Personnel engaged in data taking and interpret ing the results of the eddy current inspection should be tested and qualified in accordance with American Society for Nondestructive Testing Standard SNT-TC-IA and supplements.* I. The examinations should be performed accord ing to written procedures. 3. Baseline Inspection a. All tubes in the steam generators should bel inspected by eddy current or alternative techniques priori to service to establish a baseline condition of the tubing. I b. For operating plants without an initial baseline inspection, the first inservice inspection performed according to regulatory positions CA and C.5 will define the baseline condition for subsequent inspections. c. Operating plants instituting a major change jn their secondary water chemistry (e.g., phosphate to volatile treatment) should conduct a baseline inspection before resumption of power operation. 4. Sample Selection and Testing Selection and testing of steam generator tubes should be made on the following basis,. a. The preservice inspection should include all the tubes in the steam generators. b. Tubes for the inspection of operating plants should be selected on a random basis except where experience in similar plants with similar secondary water chemistry indicates critical areas to be inspected. c. At least 3% of the total number of tubes in each steam generator to be inspected should be tested during each inspection (see regulatory positions C.3 and C.6). d. All of the steam generators in a given plant should be inspected at the first inservice inspection. Subsequent inspections may be limited to one steam generator on a rotating schedule encompassing 3% of the total tubes of the steam generators in the plant if the 4SNT-TC-IA and Supplements, "Recommended Practice for Nondestructive Testing Personnel Qualification and