ML041460297
| ML041460297 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 08/09/2004 |
| From: | Morgan M NRC/NRR/DRIP/RLEP |
| To: | Nuclear Management Co |
| Morgan M, NRR/NRC/DRIP/RLEP, 415-2232 | |
| Shared Package | |
| ML041460261 | List: |
| References | |
| Download: ML041460297 (31) | |
Text
SCOPING AND SCREENING FOR LICENSE RENEWAL (redacted)
1.0 PURPOSE 1.1 The purpose of this procedure is to provide instructions for implementing the scoping and screening process for Point Beach Nuclear Plant in accordance with the requirements of 10 CFR Part 54, the License Renewal Rule.
1.2 The purpose of the scoping and screening process is:
to identify the systems and structures (SSs) that are within the scope of license renewal (LR) and the intended functions of those SSs, in accordance with the requirements of 10 CFR 54.4(a) and 10 CFR 54.4(b), and to identify the components of those SSs that are subject to an aging management review, as required by 10 CFR 54.21(a)(1) of the License Renewal Rule.
1.3 This procedure also provides the requirements for documentation of the scoping and screening process.
2.0 DISCUSSION This scoping and screening information required by this procedure will be captured in the License Renewal Database (LRDB). The complete set of data required to be captured by this procedure is provided in Attachment 5, Data Requirements for Scoping and Screening. Details on the use of the LRDB can be found in the LRDB User's Guide. The format of the reports to be generated to document the scoping and screening results is described in the License Renewal Project Procedure. The scoping and screening process is graphically displayed in Attachment 3, System and Structure Level Scoping Process Flow Diagram, and Attachment 4, Component Level Screening Process Flow Diagram.
From the License Renewal Rule, systems, structures, and components (SSC) within the scope of License Renewal are:
§54.4 (a)(1)
Safety-related systems, structures, and components which are those relied upon to remain functional during and following design-basis events (as defined in 10 CFR 50.49 (b)(1)) to ensure the following functions (i)
The integrity of the reactor coolant pressure boundary; (ii)
The capability to shutdown the reactor and maintain it in a safe shutdown condition; or (iii)
The capability to prevent or mitigate the consequences of accidents that could result in potential offsite exposure comparable to the guidelines in § 50.34(a)(1), 50.67(b)(2), or
§ 100.11 of this chapter, as applicable.
§54.4 (a)(2)
All non-safety-related systems, structures, and components whose failure could prevent satisfactory accomplishment of any of the functions identified in paragraphs (a)(1)(i), (ii), or (iii) of this section (i.e. §54.4).
§54.4 (a)(3)
All systems, structures, and components relied on in safety analyses or plant evaluations to perform a function that demonstrated compliance with the Commission's regulation for fire protection (10 CFR 50.48), environmental qualification (10 CFR 50.49), pressurized thermal shock (10 CFR 50.61), anticipated transients without scram (10 CFR50.62), and station blackout (10 CFR 50.63).
In order to be included within the scope of the license renewal rule, an SS must satisfy at least one of the criteria in §54.4(a)(1) through (a)(3). It is likely that some SSs will satisfy more than one of these scoping criteria. It is important that any and all of the scoping criteria which are satisfied are identified and documented.
The Rule defines intended functions as:
§ 54.4(b)
The intended functions that these systems, structures, and components must be shown to fulfill in
§54.21 are those functions that are the bases for including them within the scope of license renewal as specified in paragraphs (a)(1) through (3) of this section.
In some cases, such as for certain safety-related SCs, all of the identified functions are intended functions, since the SS was put in place for only that purpose. In other cases, SSs were designed for several different purposes, and only some of them result in intended functions.
In some cases, only a part of an SS is required to perform an intended function. As an example, in the Main Steam System, only that part of the system from the Steam Generators up to the Main Steam Isolation Valve are required to perform a containment isolation function. The function is identified as an intended function for the Main Steam System. In this case, at the system level, Main Steam will be scoped as within the scope of license renewal, but at the component level (see section 4.2), many components in the Main Steam System will not be within the scope of license renewal.
The Rule also requires that the structures and components (SCs) subject to an aging management review (AMR) be identified. The criteria for determining the structures and components subject to an aging management review are provided in §54.21(a). Specifically, the Rule states:
Sec. 54.21 Contents of application - technical information.
Each application must contain the following information:
(a)
An integrated plant assessment (IPA). The IPA must:
(1)
For those systems, structures, and components within the scope of this part, as delineated in Sec. 54.4, identify and list those structures and components subject to an aging management review. Structures and components subject to an aging management review shall encompass those structures and components--
(i)
That perform an intended function, as described in Sec. 54.4, without moving parts or without a change in configuration or properties. These structures and components include, but are not limited to, pressure retaining boundaries, component supports, reactor coolant pressure boundaries, the reactor vessel, core support structures, containment, seismic Category I structures, electrical cables and connections, and electrical penetrations, excluding, but not limited to, pumps (except casing), valves (except body), motors, batteries, relays, breakers, and transistors; and (ii)
That are not subject to replacement based on a qualified life or specified time period.
An RAI (Request for Additional Information) Database has been developed for use by the License Renewal Team, by collecting RAIs from other LRA submittals. It is recommended that this RAI database be searched during the scoping and screening process, in order to address questions/issues (when appropriate) that were previously identified by the NRC.
The effects of a Power Uprate Project do not affect the results of scoping and screening (it will not change components in-scope, nor how they are screened).
LRPG 1-4, Scoping and Screening Guideline can be referenced during the scoping and screening process for additional site specific guidance.
4.0 PROCEDURE Subsection 4.1 of this procedure provides detailed instructions for determining which plant systems and structures (SSs) are within the scope of the License Renewal Rule. Subsection 4.2 contains detailed instructions for determining which components of the in-scope SSs are subject to an Aging Management Review (AMR). This process must be completed for all SSs to ensure that the entire plant is addressed. NOTE: If a system or structure is determined to be out-of-scope for LR, then the screening process for that system/structure does not need to be completed.
LR Systems were developed to reduce the overall number of systems that need to be evaluated and to more closely match the systems that are normally referred to in the GALL and SRP. The plant specific (CHAMPS) systems that make-up an LR system are shown in Attachment 10.
4.1 System and Structure Scoping Steps 4.1.1 through 4.1.5 determine which systems and structures (SS) are within the scope of License Renewal. Subsections 4.1.1 through 4.1.5 may be performed in parallel, although it is not necessary. The designated LRE may perform the procedure as deemed most appropriate or efficient. The only requirement is that all subsections are performed for each SS.
4.1.1 Define System or Structure This definition process shall be completed for all systems and structures to ensure that the entire plant is addressed. Initial reviews should begin with the systems identified in the FSAR and Q-List, including the commodities identified in step 4.2. As the project evolves, additional systems or structures may be identified as requiring review.
The LRE designated to perform the scoping will identify and describe (define) the system or structure assigned for review. Potential sources of this information will include, but are not limited to:
- Design Basis Documents
- System Descriptions
- Plant greenline drawings The following information must be documented in the License Renewal Database (LRDB).
- The system or structure name and designated abbreviation. For example:
the Auxiliary Feedwater System and AFW.
- A concise but complete description of the system or structure.
- A list of functions performed by the system or structure. (Note that these functions may or may not be intended functions. This list needs to be complete enough to ensure that all intended functions are identified.
Functions are to be selected from the list supplied in Attachment 2.
- Provide the applicable design or licensing basis references for the information obtained.
4.1.2 Scoping for Safety-Related Systems and Structures (Criterion 1)
Safety-Related systems that are relied on to remain functional during and following design-basis events are within the scope of license renewal. As part of the current licensing basis, evaluations may have been performed and documented which identify the systems that are explicitly relied upon to mitigate design basis events. Alternatively, all systems that contain Safety-Related components are within scope per Criterion 1. The following procedure steps describe how to identify the intended functions performed by the system or structure under review from the appropriate reference documents.
A. Review plant documents that contain information regarding the systems and structures relied upon to remain functional during and following design-basis events. Potential sources of this information will include, but are not limited to:
- System Descriptions
- Q-List
- CHAMPS
- Greenline Drawings
- DBD source documents
- Maintenance Rule The Maintenance Rule (MR), 10 CFR Part 50.65, includes a scoping step, which is identical to the scope statement for safety-related equipment in the License Renewal Rule. Therefore, scoping requirements for the Maintenance Rule included steps to identify safety-related systems and
structures. These sources can be used as inputs for the identification of information to document compliance with Part 54.4 (a)(1) of the Rule.
Because of plant-unique considerations and preferences, some equipment may have been designated as safety-related which does not perform any of the requirements of Criterion 1. This equipment should not be considered within the scope of the Rule simply because of its classification.
B. From the documentation reviewed above, identify the intended functions, if any, for the system or structure under review. Use the list of functions in Attachment 2.
C. Based on the results of these steps, the following information must be documented in the License Renewal Database (LRDB).
Identify which system or structure function(s) from those listed in accordance with subsection 4.1.1 are intended functions per Criterion 1 of the Rule. Include a short description of how the system performs that function in the comment section.
Identify the applicable design or licensing basis references used to make the determination.
4.1.3 Scoping for Non Safety Affecting Safety Systems and Structures (Criterion 2)
All functionally non-safety-related systems, structure, and components (SSCs) whose failure could prevent satisfactory accomplishment of any Criterion 1 intended function are within the scope of license renewal per Criterion 2 of the Rule. Some of these items may already be classified AQ or Augmented Quality, as appropriate. The NRC issued Interim Staff Guidance (ISG) on this issue. The industry is developing guidance for scoping in accordance to this ISG. This industry guidance will be used to assist in the determination of SSCs that meet the definition of Criterion 2. This industry guidance is being proposed for incorporation into Rev. 4 of NEI 95-10.
SSCs in the following categories may satisfy Criterion 2:
NSR SSCs identified in the CLB Structural II/I items Equipment credited for HELB (pipe whip, jet impingement)
Equipment credited for internal flooding (barriers, drains)
Equipment credited for external flooding Equipment credited for internal missiles Load handling equipment credited for NUREG-0612 Alternate/backup systems credited in DBEs NSR SSCs directly connected to SR SSCs NSR piping between SR/NSR boundaries and the next equivalent anchor.
NSR SSCs not directly connected to SR SSCs
Mitigative Option If the mitigative option is used, then the mitigative features (whip restraints, spray shields, supports, barriers, etc. ) need to be included within the scope of license renewal, but the non-safety system can be excluded from the scope of license renewal.
Preventive Option If mitigative features are not installed or can not be shown to adequately protect safety related SSCs, then the preventative option needs to be used. The NRC's concern is that age-related degradation of the non-safety SSCs could change pipe break assumptions and, as a result, create additional interactions/failures of the safety-related SSCs with spray or leakage from the non-safety systems.
See which document the Criterion 2 scoping methodology and results for PBNP. This methodology and results evaluation is intended to meet the intent of the ISG on Criterion 2.
A. Based on the results of this evaluation, the following information must be documented in the License Renewal Database (LRDB).
Identify which systems or structures have the potential to affect safety-related (Criterion 1) intended function per Criterion 2 of the Rule (System Function Y). Include a short description of how each system or structure meets Criterion 2 in the comment section.
Identify the applicable design or licensing basis references used to make the determination.
4.1.4 Scoping for Systems and Structures Relied Upon in Regulated Events (Criterion 3)
All systems and structures relied upon in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commission's regulations for fire protection (FP, 10 CFR 50.48), environmental qualification (EQ, 10 CFR 50.49), pressurized thermal shock (PTS, 10 CFR 50.61), anticipated transients without scram (ATWS, 10 CFR 50.62), and station blackout (SBO, 10 CFR 50.63) are within the scope of license renewal.
For each of these regulations, current licensing basis evaluations have been performed and documented which identify the systems, structures, and/or equipment that is explicitly relied upon for compliance. The following procedure steps require identification of the applicable systems and structures from the appropriate reference documents that identifies the CLB for compliance with the respective regulation.
Note that the system or structure must perform a function which is required for compliance with a particular regulation. Mere mention of a system or structure in the documentation does not mean that it was relied upon to demonstrate compliance. Also, certain systems or structures may be relied upon for compliance with more than one of the identified regulations. All instances of compliance must be identified.
A. Systems and Structures Relied Upon for Fire Protection Review the Fire Protection Evaluation Report for information regarding the SSCs relied upon for compliance with the requirements of 10 CFR 50.48.
10 CFR 50.48 describes the requirements and implementation schedules for a fire protection plan satisfying 10 CFR 50, Appendix A, General Design Criterion 3 (GDC-3). Appendix R of Part 50 and/or BTP 9.5-1, Revision 1, establish the fire protection features required to satisfy GDC-3.
The FP SSCs satisfying §50.48 may have already been identified by existing plant classification processes.
B. Systems and Structures Relied Upon for EQ Review plant documents that contain information regarding the SSCs relied upon for compliance with the requirements of 10 CFR 50.49. 10 CFR 50.49 requires that a list be prepared of certain electrical components that are required to withstand environmental conditions which may occur during or following a design-basis event. Although this requirement is for electrical equipment, some of this electrical equipment operates mechanical equipment, and/or is housed within and protected by structures or structural equipment. Mechanical systems and structures containing environmentally qualified electrical equipment are within the scope of license renewal.
Licensees may rely upon their listing of 10 CFR 50.49 equipment, as required by 10 CFR 50.49(d), for purposes of satisfying §54.4 with respect to equipment within the scope of §50.49. This list of equipment will be used to determine the EQ SSCs in scope. A detailed review of the manual is necessary to identify all systems and the intended functions they perform to satisfy this part.
C. Systems and Structures Relied Upon for PTS Review plant documents that contain information regarding any SSCs relied upon for compliance with the requirements of 10 CFR 50.61. 10 CFR 50.61, Fracture Toughness Requirements for Protection Against Pressurized Thermal Shock Events, requires that licensees evaluate the reactor vessel beltline materials against specific criteria to ensure protection against brittle fracture. PBNPs PTS Evaluation was performed in accordance with Regulatory Guide (RG) 1.154 in order to satisfy 10 CFR 50.61 requirements. If SSCs are credited in the analysis to protect against brittle fracture, they will be in scope for LR.
D. Scoping for Systems and Structures Relied upon for ATWS Review plant documents that contain information regarding the SSCs relied upon for compliance with the requirements of 10 CFR 50.62. 10 CFR 50.62, Requirements for Reduction of Risk from Anticipated Transient Without Scram (ATWS) Events for Light-Water-Cooled Nuclear Power Plants, requires specific improvements in the design and operation of commercial nuclear power facilities to reduce the likelihood of failure to shut down the reactor following anticipated transients, and to mitigate the consequences of an ATWS event. A detailed review of the applicable plant documents is necessary to identify all systems and structures and the intended functions they perform to satisfy this part.
E. Scoping for Systems and Structures Relied upon for SBO Review plant documents that contain information regarding the SSCs relied upon for compliance with the requirements of 10 CFR 50.63, Loss of All Alternating Current Power, which requires a plant to be able to withstand, for a specified duration, and recover from, a station blackout (loss of all alternating current power). This regulation further required that a coping evaluation be performed to determine a plant's ability to deal with a station blackout event.
The SBO coping assessment is contained in SBO Design Basis Document.
A detailed review of the assessment is necessary to identify the required systems and structures and the intended functions they perform to satisfy this part.
F. From the documentation reviewed above, identify the systems or structures that meet Criterion 3.
G. Based on the results of these steps, the following information must be documented in the License Renewal Database (LRDB).
- Identify which systems or structures are required for regulated events per Criterion 3 of the Rule (System Functions Z1, Z2, Z3, Z4, and Z5).
Include a short description of how each system or structure meets Criterion 3 in the comment section.
- Identify the applicable design or licensing basis references used to make the determination.
4.1.5 Determination of LR Evaluation Boundaries This step provides the process to define the license renewal physical/functional boundaries of the systems or structures within the scope of license renewal. Precise boundaries are necessary to assure that all components required to support system and structure intended functions are considered for inclusion within the scope of license renewal. The evaluation boundaries are defined by identifying (with descriptions, highlighted greenline drawings or other suitable method) the boundaries associated with the intended functions identified in subsections 4.1.1 through 4.1.4 of this procedure as follows:
- For mechanical systems, the pressure boundary or functional boundary associated with the system.
- For electrical systems, the electrical boundary or functional boundary associated with the system.
- For structures, the functional boundary associated with the structure.
Boundaries are required to be established for the interface of the mechanical systems with electrical equipment (i.e., power or control cable to a motor operated valve) and with structural equipment (i.e., component supports and pipe hangers). Plant greenline drawings may be useful for depicting system boundaries and interfaces. Electrical components supply power and control signals to mechanical components. Mechanical components supply or interact with electric components to produce signals. Mechanical/electrical equipment is supported by, housed within, and shielded by structural components. The boundary between these interfaces must be clearly defined through word descriptions and/or diagrams.
For items that lend themselves to being evaluated as a commodity (such as electrical cables or component supports), it may be more appropriate or convenient to identify the entire plant or portions of the plant as being within scope. Similarly, for structures, it will be appropriate to identify the entire plant, portions of the plant, or structure as being within scope. In such cases, no value is added by identifying specific boundaries for evaluation, and descriptions of the scope of the commodity group or structure under review is sufficient.
Steps 4.1.5.A through 4.1.5.D below describe the process for highlighting the mechanical and electrical system LR evaluation boundaries. This subsection may be performed in parallel to subsections 4.1.1 through 4.1.4, although it is not necessary
A. Safety-Related Design Basis Event Mitigation Boundaries SSCs relied upon to remain functional during and following design-basis events are within the scope of license renewal per Criterion 1 of the Rule.
These SSCs are generally classified as safety-related. The mechanical safety-related boundaries have already been identified on plant greenline drawings.
For mechanical systems, all safety-related pressure boundaries are identified on the greenline drawings. The safety classes are defined in Safety Related and QA Scope Classification. Using the previously obtained copy of the greenlines for the system under review, confirm the pressure boundary of the system meeting Criterion 1.
For mechanical systems, all interfacing pressure boundaries, such as branch lines and instrument lines for the required flow paths, must also be identified unless analysis or calculation demonstrates that loss of the branch line or instrument line pressure boundary will not affect performance of the intended function(s).
For electrical systems, either describe or graphically depict (on appropriate electrical greenline drawings) the electrical boundary for the system being evaluated.
For electrical systems, all Class 1E boundaries that assure the necessary electrical continuity are available for a system to perform its intended function(s) must be identified. It is expected that all components within such boundaries are already classified as safety-related.
Ensure that the boundary is consistent with the findings obtained in subsections 4.1.2 through 4.1.4. Make corrections as necessary and initiate corrective action if deemed appropriate.
B. AQ and Non-Safety Related (NSR) Evaluation Boundaries Functionally NSR SSCs whose failure could prevent satisfactory accomplishment of any Criterion 1 intended function are within the scope of license renewal per Criterion 2 of the Rule. These SSCs are generally classified as AQ. In addition, SSCs classified as NSR may be relied upon in safety analyses or plant evaluations in response to regulated event(s) per Criterion 3.
Some mechanical Criterion 2 and 3 SSCs may already be identified on plant greenlines.
For mechanical systems, identify functionally non-safety related pressure boundaries whose failure may adversely affect safety-related pressure boundaries. It is expected that all such pressure boundaries are already classified as AQ or NSR. All AQ and NSR pressure boundaries can be determined using plant greenline drawings and the CHAMPS database.
The safety classes are defined in xx, Safety Related and QA Scope Classification. Using the greenlines for the system under review, highlight or confirm the pressure boundary of the system meeting Criterion 2 and 3 intended functions.
For electrical systems, either describe or graphically depict the electrical boundary for the system being evaluated.
Ensure that the boundary is consistent with the findings obtained in subsections 4.1.2 through 4.1.4. Make corrections as necessary and initiate corrective action if deemed appropriate.
C. Cross-Discipline Review To ensure that there are no components at discipline boundaries/interfaces that are excluded from review, a cross-discipline review of boundary information is required. The boundary documentation shall be routed to the support disciplines for determining the evaluation boundary relative to that discipline. For example, completed mechanical boundary descriptions will be provided to the electrical and civil disciplines for their use in determining the evaluation boundary from an electrical and civil perspective. The engineer of the support discipline shall determine the greenline drawings or system boundary description to be included in the boundary documentation package as well as identify any appropriate references.
D. Documentation Based on the results of these steps, the following information must be documented:
- Ensure that the evaluation boundaries are clearly marked on boundary drawings or described accordingly in the LRDB.
4.2 Component Level Screening Once the systems and structures in scope for LR and their intended functions have been identified in section 4.1, completion of section 4.2 will identify the components of each system and structure that are subject to an aging management review, specifically, those components performing an intended function without moving parts or without a change in configuration or properties and that are not subject to replacement based on a qualified life or specified time period. Components that are constructed of the same materials, are exposed to the same environments, and perform the same intended functions regardless of the specific system or structure to which they are assigned, may benefit from evaluation as commodity groups. Commodity group components will not be associated with a specific system or structure, but, when identified in the following steps, will be associated with the applicable commodity group. Each commodity group will be evaluated as if it were a separate, individual system.
The following type components will be evaluated as commodities:
Electrical Cables Component Supports Electrical Panels Electrical Penetrations 4.2.1 Identification of Components Within the LR Evaluation Boundaries Develop a comprehensive list of components that exist within the LR evaluation boundary for the system or structure under review by performing the following steps:
A. Populate the LRDB with a list of components from the plant electronic database for the systems or structure determined to be within the scope of license renewal (WSLR) in step 4.1. Most mechanical and electrical SSCs have already been identified in the plant electronic database B. Since certain components may not be uniquely identified in the plant electronic database, such as structural components, add components as necessary to create a complete list for the system or structure under review.
Use the following sources of potential information:
- A generic list of potential components is provided in Attachments 1-1, 1-2, and 1-3.
- DBD source documents, FSAR, greenline drawings, specifications, vendor manuals, training manuals, maintenance records, etc.) may identify other components within the established LR evaluation boundaries.
- A walkdown of the system or structure may prove useful, especially for structural items.
Note that major components were included in scope at a very high level.
Westinghouse Generic Topical Reports (GTRs) or plant specific evaluations, were utilized to further define these components. The following ASME Class 1 components were evaluated using the GTRs:
- Reactor Vessel Internals (NRC Reviewed)
- Pressurizer (NRC Reviewed)
- Class 1 Piping (NRC Reviewed)
Major component information is NOT included in LRPMS, as it is all contained within the component Aging Management Review Report.
C. Based on the results of these steps, the following information must be documented in the License Renewal Database (LRDB). (
- Identify the components within the evaluation boundaries for the system or structure under review.
4.2.2 Identification of Long-Lived Passive SSCs Paragraph 54.21(a) of the license renewal rule states that components subject to an aging management review are those structures and components (SCs) that perform an intended function without moving parts or without a change in configuration or properties and are not subject to replacement based on a qualified life or specified time period. The following procedure steps describe the process to identify components subject to an aging management review.
A. All structural components within the evaluation boundaries, with the exception of snubbers, are assumed to be long-lived and passive, and thus are subject to aging management review.
B. For the mechanical and electrical components that are within the LR evaluation boundaries of the system or structure under review, determine which components function with moving parts or with a change in configuration or properties (i.e. active components). Use Appendix B to NEI 95-10, which contains a list of component types and indicates whether they are generally considered to be passive or active.
Although paragraph 54.21(a) lists only three instruments as exempt from an aging management review, all instruments are exempt because they perform their function(s) with moving parts and/or a change of configuration or properties. However, those instruments that form an integral part of the pressure-retaining boundary, such as level glasses, flow glasses, and in-line flow switches require an aging management review. In addition, the definition of cooling fans is expanded to include ventilation fans, exhaust fans, purge fans, and blowers. Finally, the definition of ventilation dampers is expanded to include ventilation louvers. All of these components are to be considered active. However, the fan/blower and damper/louver housings are passive and may require an aging management review.
C. For the mechanical and electrical components that are within the LR evaluation boundaries of the system under review, determine which components are subject to replacement based on a qualified life or specified time period (i.e. not long-lived components). This information may be obtainable from the Maintenance Program or the EQ Program.
These components are not subject to AMR. Provide justification for using this option. Identify the callup or other work control mechanism that ensures routine replacement.
D. Based on the results of these steps, the following information must be documented in the License Renewal Database (LRDB).
- Identify, for each component within the evaluation boundaries for the system or structure under review, whether it is active or periodically replaced, and hence not subject to AMR.
4.2.3 Identification of Component Intended Functions A component function is an intended function if it must perform that function for the system or structure to be able to perform its intended function(s). For example, pressure boundary failure of a component would cause loss of inventory from the parent system, and the system would subsequently be unable to perform its intended function(s). The following procedure steps describe how to make this determination. This process is to be performed for each of the passive, long-lived components (i.e. the components identified in subsection 4.2.2) since only these components will be subject to AMR.
A. For the components subject to AMR, determine which component function(s) must be performed in order for the system or structure to be able to perform the system or structure intended function(s).
Attachments 1-1, 1-2, and 1-3 list possible component-level intended functions for mechanical, electrical, and structural components types, respectively.
B. Components may have more than one intended function. All intended functions must be considered. If a component intended function can't be identified for a component, then it is not subject to AMR. A component that is subject to AMR must have at least one intended function.
C. Based on the results of these steps, the following information must be documented in the License Renewal Database (LRDB).
- Identify the component intended function(s) for the components subject to AMR for the system or structure under review.
At this point scoping and screening has been completed for the system or structure under review, and the evaluator may proceed with aging management review.
ATTACHMENT 1-1 MECHANICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 1 of 4 Component Possible Component Intended Function(s)
Pipe PB Pipe Fittings PB Tubing PB Tubing Fittings PB Thermowells PB Spool Piece PB Blank Flange PB Blind Flange PB Ductwork PB Spent Fuel Transfer Tube PB Muffler/Silencer PB, NR, TH Fire Hose PB Spray and Sprinkler Nozzles PB, SP Mulsifyer PB Spargers PB Air Ejectors PB, GR Traps PB Continuous Drain Orifice PB, TH Flow Restriction Orifice PB, TH Flow Restrictor (Pipe Fitting)
PB, TH Quick Disconnect PB Flexible Hose PB Flexible Couplings PB Mechanical Expansion Joints PB Delay Coil PB, TH Expansion Coil PB, TH Pressure Breakdown Coil PB, TH Spectacle Flange PB Mechanical Bellows PB Valves (Body Only)
PB Throttle Valves (Body Only)
PB Vacuum Breaker (Body Only)
PB Check Valve (Body Only)
PB Automatic Recirculation Control Valve (Body Only)
PB
ATTACHMENT 1-1 MECHANICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 2 of 4 Component Possible Component Intended Function(s)
Automatic Flow Control Valve (Body Only)
PB Pressure Regulating Valve (Body Only)
PB Temperature Regulating Valve (Body Only)
PB Air and Vacuum Valve (Body Only)
PB Safety/Relief Valve (Body Only)
PB Refrigeration Expansion Valve (Body Only)
PB Single Cycle Relief Valve (Rupture Disks)
(Body Only)
PB Three Way Valve (Body Only)
PB Three Way Temperature Regulating Valve (Body Only)
PB Three Way Pressure Regulating Valve (Body Only)
PB Ram Valve (Body Only)
PB Fire Hydrant (Body Only)
PB Heat Exchangers PB, HT Condensers PB, HT Heating/Cooling/Refrigerant Coils PB, HT Steam Generators PB, HT Electric Heaters PB Chillers PB, HT Evaporators PB, HT Feedwater Heaters PB, HT Moisture Separator Reheaters PB, HT, WR Room/Building Heaters/Coolers PB, HT Oil Coolers PB, HT Motor Coolers PB, HT Tanks PB Surge Tanks PB
ATTACHMENT 1-1 MECHANICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 3 of 4 Component Possible Component Intended Function(s)
Pressure Vessels PB Reactor Vessel PB Accumulators PB Hotwells PB Pressurizer PB Expansion Tank PB Discharge Accumulator/Pulsation Damper PB Pumps (Casing Only)
PB Turbochargers (Casing Only)
PB Air Motors (Casing Only)
PB Air Handling Units PB Turbines (Shell Only)
PB Air Flow Monitors PB Pitot Tube PB, TH Annubar PB, TH Flow Orifice PB, TH Flow Nozzle PB, TH Flow Glass PB Flowmeter (Venturi)
PB, TH Level Glass PB Sightglass PB Flow Switch (Inline)
PB Filters PB, FI Strainers PB, FI Demineralizers PB, FI Agitator (Mixer)
PB Lubricator PB Air/Gas Dryer PB Screen/Grille PB, FI Governor Air Boost PB Funnels PB Eductor PB, GR Blender PB Distributor PB Bolting MCI
ATTACHMENT 1-1 MECHANICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 4 of 4 Key to Possible Component Intended Functions FI Provide filtration of process fluid so that downstream equipment and/or environments are protected.
GR Provide gas removal so that sufficient vacuum is maintained, or to ensure sufficient fluid system level/priming/inventory.
HT Provide heat transfer so that system and/or component operating temperatures are maintained.
NR Provide noise reduction so that sufficient noise levels are maintained.
PB Maintain mechanical pressure boundary integrity so that sufficient flow and/or sufficient pressure is delivered.
SP Provide spray flow so that sufficient spray flow and/or flow pattern is maintained.
TH Provide throttling so that sufficient flow and/or sufficient pressure is delivered, to provide backpressure, to provide pressure reduction, to provide differential pressure, or to achieve balanced flow or prevent flow from being diverted to the faulted loop (in the specific case of the HPI System).
WR Provide water removal so that sufficient moisture levels are maintained, or to ensure that sufficient steam quality is maintained.
MCI Provide mechanical closure integrity on bolted joints.
ATTACHMENT 1-2 ELECTRICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 1 of 3 Electrical Component Types Intended Functions Active (No AMR) or Passive (AMR)
Alarm Units (e.g., fire detection devices)
To sense a parameter and provide an output at a predetermined (threshold) level.
Active Analyzers (e.g., gas analyzer, conductivity analyzer)
To examine the item being analyzed and determine its constituent parts.
Active Annunciator (e.g., lights, buzzers, alarms)
To audibly and visually alert operators of a plant condition or occurrence.
Active Batteries To store energy.
Active Cables and Connections, Bus Specifically: Insulated Cables & Connections, Isolated-Phase Bus, Nonsegregated-Phase Bus, Segregated-Phase Bus, Switchyard Bus, Transmission Conductors, Uninsulated Ground Conductors (e.g., power cable, instrument cable, control cable, EPA cables and connections, communication cable, bare cable, connector, splice, fuse holders outside of cabinets of active electrical SCs, terminal block, switchgear bus, load center bus, motor control center bus)
To provide electrical connections to specific sections of an electrical circuit to deliver voltage, current, or signals.
To insulate and support electrical conductors.
Passive, Long-Lived - AMR Required Chargers, Converters, Inverters (e.g., voltage/current converter, voltage/pneumatic converter, battery charger/inverter, motor-generator set)
To convert energy from one form into another form.
Active Circuit Breakers (e.g., air circuit breaker, molded case circuit breaker, oil-filled circuit breaker)
To connect or disconnect an electrical circuit in a controlled manner.
Active Communication Equipment (e.g., telephone, video or audio recording or playback equipment, intercom, computer terminal, electronic messaging, radios, transmission line traps and other power-line carrier equipment)
To permit the interchange of information.
Active Electrical Controls and Panel - Internal Component Assemblies (includes internal devices such as, but not limited to, switches, indicating lights, annunciators, recorders, indicators, meters, relays, fuses, fuse blocks, terminal blocks, hook-up wire)
To provide an operator/plant equipment and system control and monitoring interface.
Active Electrical Penetration Assemblies To electrically connect two sections of an electrical circuit through the containment wall while maintaining containment integrity.
Passive, Long-Lived - AMR Required
ATTACHMENT 1-2 ELECTRICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 2 of 3 Electrical Component Types Intended Functions Active (No AMR) or Passive (AMR)
Elements, RTDs, Sensors, Thermocouples, Transducers (e.g., temperature sensor, conductivity element, flow element, thermocouple, RTD, vibration probe, watt transducer, amp transducer, frequency transducer, power factor transducer, speed transducer, var transducer, vibration transducer, voltage transducer)
To convert a measured physical parameter into a proportional electrical output or parameter change.
Active Generators, Motors (e.g., diesel generator, steam turbine generator, combustion turbine generator, fan motor, pump motor, valve motor, air compressor motor)
To convert mechanical energy into electrical energy or electrical energy into mechanical energy.
Active Heat Tracing, Heaters To generate heat.
Active Indicators (e.g., analog indicator, digital indicator, LED bar graph indicator, LCD indicator, temperature indicator, flow indicator, differential pressure indicator, pressure indicator, level indicator, speed indicator)
To indicate or represent the value of a parameter being measured.
Active Fuses To disconnect an electrical circuit at a predetermined current and duration.
Active High-Voltage Insulators [separate, high voltage equipment]
(e.g., porcelain insulator)
To insulate and support an electrical conductor.
Passive, Long-Lived -
AMR Required Isolators (e.g., transformer isolator, optical isolator, isolation relay, isolating transfer diode)
To isolate part of an electrical circuit from the undesired influence of other parts of the circuit.
Active Light Bulbs (e.g., incandescent light bulb, fluorescent light bulb, indicating light)
To illuminate.
Active Loop Controllers (e.g., programmable logic controller, single loop digital controller, process controller {pressure, speed, temperature}, manual loader, selector station, hand/auto station, auto/manual station)
To measure the value of a variable and correct or limit deviation from a reference value.
Active Meters (e.g., ammeter, volt meter, frequency meter, var meter, watt meter, power factor meter, watt-hour meter)
To measure (and indicate) the value of a parameter.
Active Power Supplies To convert input power to a prescribed voltage.
Active Radiation Monitors (e.g., area radiation monitor, process radiation monitor)
To measure the amount of radiation.
Active Recorders (e.g., chart recorder, digital recorder, events recorder)
To record input data for later reference or retrieval.
Active Regulators (e.g., voltage regulator)
To vary or prevent variation in a desired characteristic.
Active
ATTACHMENT 1-2 ELECTRICAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 3 of 3 Electrical Component Types Intended Functions Active (No AMR) or Passive (AMR Relays (e.g., protective relay, control/logic relay, auxiliary relay)
To open and close electrical contacts in a specified manner based on electrical, mechanical, thermal or other type of input.
Active Signal Conditioners To maintain a signal within specified parameters.
Active Solenoid Operators To move an armature in a reciprocating motion.
Active Solid-State Devices (e.g., transistor, circuit board, computer)
To control current using electric or magnetic phenomena in solids.
Active Surge Arresters [separate, high voltage equipment]
(e.g., lightning arrester, surge suppressor, surge capacitor, protective capacitor)
To limits surge voltages or currents on an electrical circuit.
Active Switches (e.g., differential pressure indicating switch, differential pressure switch, pressure indicator switch, pressure switch, flow switch, conductivity switch, level indicating switch, temperature indicating switch, temperature switch, moisture switch, position switch, vibration switch, level switch, control switch, automatic transfer switch, manual transfer switch, manual disconnect switch, current switch, limit switch, knife switch)
To open, close or change the connections of an electrical circuit.
Active Switchgear, Load Centers, Motor Control Centers, Power Distribution Panels (includes internal component assemblies such as, but not limited to, busses, breakers, indicating lights, transformers, relays, meters, switches, fuses, fuse blocks, terminal blocks, hook-up wire, insulators)
To provide the means in a consolidated enclosure to connect or disconnect electrical loads in a controlled manner from a common bus.
Active Transformers (e.g., large power transformer, load center transformer, small distribution transformer, instrument transformer, isolation transformer, coupling capacitor voltage transformer)
To induce a voltage in a separate electrical circuit.
Active Transmitters (e.g., flow transmitter level transmitter, differential pressure transmitter, static pressure transmitter)
To send (output) an electrical signal.
Active
Page 23 of 31 INFORMATION USE ATTACHMENT 1-3 CIVIL / STRUCTURAL COMPONENT TYPES AND POSSIBLE INTENDED FUNCTIONS Page 1 of 1 Structure / Component Possible Intended Function Containment, Auxiliary, Intake, Turbine Safety -
Related (SR) Tank and Emergency Diesel Generator Buildings.
Shelter and protect safety-related equipment Structural support for safety -related equipment Pressure boundary to protect public health & safety.
Provide related fire barrier.
- 1. Provide shielding against radiation and or heat.
- 2. Provide internal and external missile barrier.
Provide flood protection barrier.
Provide heat sink during a DBA.
Provide source of cooling water.
SR & II/I pipe supports Structural support for safety -related equipment SR & II/I conduit and raceway supports Structural support for safety -related equipment Electrical junction boxes.
Structural support for safety -related equipment Pipe whip restraints Protect safety-related equipment HELB shields Protect safety-related equipment Water tight doors Provide flood protection barrier.
Fire rated doors Provide related fire barrier.
Fire walls, barriers and penetration seals Provide related fire barrier.
Masonry Walls Provide related fire barrier.
Shelter and protect safety-related equipment.
Structural support for safety -related equipment.
SR equipment foundations Structural support for safety -related equipment.
Support and anchorage Threaded fasteners Structural support for safety -related equipment.
Crane rails and girders Structural support for safety -related equipment.
Curbs Flooding and Fire Protection.
Vent Stacks Provide path for release for gaseous discharge.
Containment penetration assemblies Pressure boundary to protect public health & safety.
Containment personnel and equipment hatches Pressure boundary to protect public health & safety.
Fuel storages pools and handling equipment.
Pressure boundary to protect public health & safety.
Field erected tanks Pressure boundary to protect public health & safety.
Intake trash racks and /or screens Provide filtration.
Sump Covers Provide filtration.
Page 24 of 31 INFORMATION USE ATTACHMENT 2 SYSTEM FUNCTION CODES SYSTEM FUNCTION CODE FUNCTION DESCRIPTION ANSI 51.1 DISCUSSION PARAGRAPH NOTES 10CFR54.4(a)
CRITERION Equivalent PBNP QA Code A
MAINTAIN REACTOR CORE ASSEMBLY GEOMETRY 4.1.1, 4.4.1 1
2 B
INTRODUCE EMERGENCY NEGATIVE REACTIVITY TO MAKE THE REACTOR SUBCRITICAL 4.2.1, 4.8.1 Functions include limiting the introduction of positive reactivity.
1 12 C
INTRODUCE NEGATIVE REACTIVITY TO ACHIEVE OR MAINTAIN SUBCRITICAL REACTOR CONDITION 4.2.1 1
12 D
SENSE OR PROVIDE PROCESS CONDITIONS AND GENERATE SIGNALS FOR REACTOR TRIP AND ENGINEERED SAFETY FEATURES ACTUATION 4.3.1 1
8 E
PROVIDE REACTOR COOLANT PRESSURE BOUNDARY 4.4.1 1
1 F
REMOVE RESIDUAL HEAT FROM THE RCS 4.5.1 Residual heat removal by direct recirculation of reactor coolant.
This system function does not address emergency core cooling via Engineered Safety Features Actuation.
1 40 G
PROVIDE EMERGENCY CORE COOLANT WHERE THE ECCS PROVIDES COOLANT DIRECTLY TO THE CORE 4.8.1 This function includes coolant that is provided to the core via RCS piping. This function also addresses coolant inventory that is maintained for use by the ECCS to provide emergency core cooling and to introduce negative reactivity.
1 4
Page 25 of 31 INFORMATION USE SYSTEM FUNCTION CODE FUNCTION DESCRIPTION ANSI 51.1 DISCUSSION PARAGRAPH NOTES 10CFR54.4(a)
CRITERION Equivalent PBNP QA Code H
PROVIDE EMERGENCY HEAT REMOVAL FROM THE REACTOR COOLANT SYSTEM USING SECONDARY HEAT REMOVAL CAPABILITY.
4.10.1 Secondary heat removal capability addresses the secondary side of the steam generators, and steam generator secondary cooling paths, for example:
Auxiliary Feedwater, Relief Valves/Lines.
1 5
J PROVIDE HEAT REMOVAL FROM AND/OR PRESSURE BOUNDARY FOR SAFETY RELATED HEAT EXCHANGERS 4.7.1 This function addresses heat removal or pressure boundary as necessary to provide a nuclear safety function. This function does not include emergency heat removal from the secondary side of the Steam Generators (System Function H).
1 6
K PROVIDE PRIMARY CONTAINMENT BOUNDARY 4.9.1 This function addresses any primary containment fission product barrier or primary containment radioactive material holdup or isolation.
1 14 L
PROVIDE EMERGENCY HEAT REMOVAL FROM PRIMARY CONTAINMENT AND PROVIDE CONTAINMENT PRESSURE CONTROL 4.11.1 1
30, 57 M
PROVIDE EMERGENCY REMOVAL OF RADIOACTIVE MATERIAL FROM THE PRIMARY CONTAINMENT ATMOSPHERE 4.11.1 1
N CONTROL COMBUSTIBLE GAS MIXTURES IN THE PRIMARY CONTAINMENT ATMOSPHERE 4.11.1 1
O MAINTAIN EMERGENCY TEMPERATURES WITHIN AREAS CONTAINING SAFETY CLASS 1,2,3 COMPONENTS 4.12.1 1
Page 26 of 31 INFORMATION USE SYSTEM FUNCTION CODE FUNCTION DESCRIPTION ANSI 51.1 DISCUSSION PARAGRAPH NOTES 10CFR54.4(a)
CRITERION Equivalent PBNP QA Code P
ENSURE ADEQUATE COOLING IN THE SPENT FUEL POOL 4.13.1 Cooling to maintain stored fuel within acceptable temperature limits.
1 31, Q
PROVIDE ELECTRICAL POWER TO SAFETY CLASS 1,2,3 COMPONENTS 4.14.1 1
7, 21, 23, R
STRUCTURALLY SUPPORT OR HOUSE SAFETY CLASS 1,2,3 COMPONENTS 4.18.1 1
15, 26, S
SPECIAL CAPABILITY CLASS FUNCTIONS N/A Components within the system are Safety Significant (augmented quality).
For the purposes of License Renewal, components which are special capability class are treated under the Criterion 3 Codes 21 through 25.
N/A 10 T
NON-NUCLEAR SAFETY CLASS FUNCTIONS N/A N/A X
SFR FUNCTION NOT APPLICABLE AT COMPONENT LEVEL N/A Not a system level function. Component performs a safety related function beyond the boundaries of the respective system specific design, such as accident monitoring.
1 9
Y LICENSE RENEWAL CRITERION 2 -
CONTAINS NON SAFETY RELATED SSCs WHOSE FAILURE COULD PREVENT SATISFACTORY ACCOMPLISHMENT OF A SAFETY RELATED FUNCTION N/A 2
16, 18, 28, 35, 38, 44 U
PROVIDE ELECTRICAL CONNECTIONS TO SPECIFIC SECTIONS OF AN ELECTRICAL CIRCUIT TO DELIVER VOLTAGE, CURRENT, OR SIGNALS N/A Commodity Intended Function for Cables and Connections. See also: Attachment 8, Item 5.
1, 3
Page 27 of 31 INFORMATION USE SYSTEM FUNCTION CODE FUNCTION DESCRIPTION ANSI 51.1 DISCUSSION PARAGRAPH NOTES 10CFR54.4(a)
CRITERION Equivalent PBNP QA Code V
INSULATE AND SUPPORT ELECTRICAL CONDUCTOR N/A Commodity Intended Function for Cables and Connections added for terminal blocks, fuse holders, and connectors in response to NRC Interim Staff Guidance positions.
1, 2, 3 Z1 License Renewal Criterion 3 - Contains SSCs relied upon in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commissions regulations for FIRE PROTECTION (10 CFR 50.48)
N/A 3
20, 25, 56 Z2 License Renewal Criterion 3 - Contains SSCs relied upon in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commissions regulations for ENVIRONMENTAL QUALIFICATION (10 CFR 50.49)
N/A 3
34, EQ flag Z3 License Renewal Criterion 3 - Contains SSCs relied upon in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commissions regulations for PRESSURIZED THERMAL SHOCK (10 CFR 50.61)
N/A 3
(RV only)
Z4 License Renewal Criterion 3 - Contains SSCs relied upon in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commissions regulations for ANTICIPATED TRANSIENTS WITHOUT SCRAM (10 CFR 50.62)
N/A 3
41
Page 28 of 31 INFORMATION USE SYSTEM FUNCTION CODE FUNCTION DESCRIPTION ANSI 51.1 DISCUSSION PARAGRAPH NOTES 10CFR54.4(a)
CRITERION Equivalent PBNP QA Code Z5 License Renewal Criterion 3 - Contains SSCs relied upon in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commissions regulations for STATION BLACKOUT (10 CFR 50.63)
N/A 3
37
Page 29 of 31 INFORMATION USE ATTACHMENT 3 SYSTEM AND STRUCTURE LEVEL SCOPING PROCESS FLOW DIAGRAM All Systems and Structures Define System or Structure and Identify All Functions Source Documentation Does system or structure mitgate DBEs?
Will failure of system or structure fail Criterion 1?
Is system or structure required for regulated events?
and No No No Identify functions that are intended functions.
Determine LR evaluation boundaries.
Yes Yes Yes QList Database DBDs P&IDs Drawings Design Changes UFSAR 4.1.1 4.1.2 4.1.3 4.1.4 Input to Component Level Screening 4.1.5 Systems and structuress in scope with intended functions and LR evaluation boundaries identified.
Systems and structures not in scope.
4.2 4.1.2
Page 30 of 31 INFORMATION USE ATTACHMENT 4 COMPONENT LEVEL SCREENING PROCESS FLOW DIAGRAM Are the components passive?
Are the components long-lived?
or Identify component intended functions.
No No Yes Yes Q List Database DBDs Drawings Design Changes P&IDs UFSAR 4.2.1 4.2.2.A, 4.2.2.B Input to Aging Management Review Identify and list components within the LR evaluation boundaries.
Source documentation 4.2.2.C 4.2.3 Components subject to AMR with intended functions identified.
Systems and Structures in scope with intended functions and LR evaluation boundaries identified.
4.1 Components not subject to AMR.
4.2.2.D 4.2.2.D
Page 31 of 31 INFORMATION USE ATTACHMENT 5 DATA REQUIREMENTS FOR SCOPING AND SCREENING The following information constitutes the required data set for scoping and screening. The applicable design or licensing basis references for this information must also be provided. This information is to be input into the License Renewal Database per the detailed steps of the procedure body. The format of scoping and screening output documents is described in the License Renewal Project Procedure (LRPP 1-1).
- (4.1.1) The system or structure name and designated abbreviation for all plant systems and structures.
- (4.1.1) A concise but complete description of each system or structure.
- (4.1.1) A list of functions performed by the system or structure selected from Attachment 2.
- (4.1.2) The system or structure function(s) that are intended functions per Criterion 1 of the Rule.
- (4.1.3) The system or structure function per Criterion 2 of the Rule.
- (4.1.4) The system or structure function(s) that are intended functions for FP, EQ, PTS, ATWS, and SBO per Criterion 3 of the Rule.
- (4.1.5) System or structure evaluation boundaries clearly marked on drawings or described accordingly in the LRDB for those systems and structures that are Within the Scope of License Renewal (WSLR).
- (4.2.1) A list of the components within the above-described evaluation boundaries for the systems and structures WSLR.
- (4.2.2) A list of the WSLR components that are long-lived and passive (subject to AMR).
- (4.2.3) The component intended function(s) for the components subject to AMR.