Technical Guidance
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| Area | Chapter | Title | Description | CN Number |
|---|---|---|---|---|
| TG | Technical Guidance | |||
| TG | ASME3&11 | ASME SECTIONS III & XI | Guidance on the ASME Sections III and XI, as it relates to Code interpretations, use of engineering judgement, and flaw evaluation. | 96-022 |
| TG | ASMEIII | ASME Boiler and Pressure Vessel Code, Section III | Guidance on procurement of ASME Section III replacements that are not currently available in full compliance with the stamping and documentation requirements of Section III of the Code. | 89-011 |
| TG | ASMEXIA | ASME Boiler and Pressure Vessel Code, Section XI | Guidance for the performance of system pressure tests (leakage and hydrostatic) using nuclear heating and to provide a definition of plant startup with regard to pressure testing. | 86-054 |
| TG | ASMEXIB | ASME Boiler and Pressure Vessel Code, Section XI | Guidance on testing normally closed check valves specified in paragraph IWV-3520 of the ASME Code Section XI, 1983Edition. | 86-026 |
| TG | FPLUGS | Mechanical - Freeze Plugs | Guidance on the use and inspection of freeze plugs. Describes problems encountered when using freeze plugs during system maintenance. | 93-005 |
| TG | ICECOND | Ice Condenser System Inspections | Guidance for inspecting the Ice Condenser (IC) system. | 05-015 |
| TG | LCOPM | Maintenance - Voluntary Entry Into Limiting Conditions for Operation Action Statements to Perform Preventive Maintenance | Guidance for use of LCOs and the Maintenance Rule (10 CFR 50.65) when performing online preventive maintenance. | 02-001 |
| TG | LEAKSEAL | Assessing On-Line Leak Sealing of ASME Code Class 1 & 2 | Provide information to inspectors regarding use of leak-sealing activities for liquid-filled systems. | 97-011 |
| TG | NOEDGAS | Operations - Notice of Enforcement Discretion For Gaseous Diffusion Plants | Staff guidance for the process to exercise enforcement discretion with regard to limiting conditions for operation (LCO) in gaseous diffusion plant Technical SafetyRequirements or other certificate conditions. | 99-008 |
| TG | ORGCOAT | Filled Organic Coatings Used In Maintenance of Safety Related Equipment | Provide information to inspectors regarding use of filled organic coatings in the maintenance of fluid systems. | 94-018 |
| TG | PRECOND | Preconditioning of Structures, Systems and Components before Determining Operabilty. | Guidance on evaluating the acceptability of preconditioning of Structures, Systems and Components (SSCs) before the performance of operability, surveillance, or conformance testing. | 98-014 |
| TG | SAFETY | Operation - Safety and Compliance | A Commission approved discussion of safety and compliance. | 07-028 |
| TG | SGTUBE | Steam Generator Plugs and Sleeving Repairs | Provide inspection guidance to review licensee activities on plugging or sleeving repairs of defective steam generator tubing. | 94-014 |
| TG | STSINTR | Licensee Technical Specifications Interpretations | Licensee-issued TS interpretations are not approved NRR staff positions. | 97-001 |
| TG | STSSURV | STS Surveillance Sections - Locked or Otherwise Secured Components | Provides inspection criteria for what constitutes a "locked close" valve. | 77-025 |
| TG | STS10 | STS Section 1.0 - Operability | Principal criteria for proper application of the STS definition of operable/operability as applied to systems and components which provide necessary support functions. | 86-026 |
| TG | STS10D | STS Section 1.0 - Definitions | Defines the scope of testing necessary to meet the STS definitions of a CFT. | 86-054 |
| TG | STS30T | STS Section 3.0 - Acceptable Measurement Tolerances for Technical Specification Limits | TS limits are established with allowances for measurement tolerances already incorporated. | 78-035 |
| TG | STS3464 | STS Section 3/4.6.4 - Containment and Drywell Isolation Valves | Isolation valves cannot be deemed operable solely because they are closed. | 88-006 |
| TG | STS3481 | STS Section 3/4.8.1 - TDI Diesel Generator Air Roll Tests | Explains TDI surveillance testing requirements when action statements apply. | 88-006 |
| TG | STS375 | STS Section 3.7.5 - Ultimate Heat Sink | Average water temperature of the ultimate heat sink TS refers to volumetric, not time averaged temperature | 88-017 |
| TG | STS428 | STS Section 4.2.8.X.X - Surveillance Requirements - 125-Volt Battery Bank | Surveillance test criteria for procedures that apply to all wet storage batteries | 79-022 |
| TG | STS451 | STS Section 4.5.1 - Standard Technical Specifications (BWR) | Licensees should may use remote position indicating lights in the control room to verify that valves are in the correct position but it is not the intent of SRs that only local valve position indication be used. | 86-026 |
| TG | STS48112 | STS Section 4.8.1.1.2 - Surveillance Testing of D/G Lockout Features | Provides the NRC position on surveillance testing of diesel generator lockout features. | 86-026 |
| TG | TG9900 | Technical Guidance | Technical Guidance 05/12/86 | 86-026 |
Page Last Reviewed/Updated Wednesday, September 02, 2026
Page Last Reviewed/Updated Wednesday, September 02, 2026