ML013300445
| ML013300445 | |
| Person / Time | |
|---|---|
| Site: | PROJ0690 |
| Issue date: | 11/23/2001 |
| From: | Division of Regulatory Improvement Programs |
| To: | Nuclear Energy Institute, Union of Concerned Scientists |
| Kang P, NRR-RLSB, 415-2279 | |
| References | |
| +KBR1SISP20050608 | |
| Download: ML013300445 (15) | |
Text
Enclosure 2 GALL REVISION Chapter II Containment Structures
2 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Item Structure and/or Component Material Environment Aging Effect/
Mechanism Aging Management Program (AMP)
Further Evaluation A1.1-a Concrete elements:
Dome; wall; basemat; ring girder; buttresses Concrete Outside containment Loss of material (spalling, scaling) and cracking /
Freeze-thaw Chapter XI.S2, ASME Section XI, Subsection IWL Accessible Areas:
Inspections performed in accordance with IWL will indicate the presence of loss of material (spalling, scaling) and cracking due to freeze-thaw.
Inaccessible Areas:
Evaluation is needed for plants that are located in moderate to severe weathering conditions (weathering index>100 day-inch/yr) (NUREG-1557).
Documented evidence to confirm that the in-place concrete had the air content between 3% to 6% and the subsequent inspections performed did not exhibit degradations related to freeze-thaw should be considered a part of the evaluation.
The weathering index for the continental US is shown in ASTM C33-90, Fig. 1.
No, if the stated conditions are satisfied for inaccessible areas A1.1-b Concrete elements:
Dome; wall; basemat; ring girder; buttresses Concrete Outside containment Increase in
- porosity, permeability, and loss of strength/
Leaching of calcium hydroxide Chapter XI.S2, ASME Section XI, Subsection IWL Accessible Areas:
Inspections performed in accordance with IWL will indicate the presence of increase in porosity, and permeability due to leaching of calcium hydroxide.
Yes, a plant-specific aging manageme nt program is required for inaccessible areas as
3 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Item Structure and/or Component Material Environment Aging Effect/
Mechanism Aging Management Program (AMP)
Further Evaluation Inaccessible Areas:
A plant-specific aging management program is required for below-grade inaccessible areas (basemat and concrete wall), if the concrete is exposed to flowing water (NUREG-1557). An aging management program is not required, even if reinforced concrete is exposed to flowing water, if there is documented evidence that confirms the in-place concrete was constructed in accordance with the recommendations in ACI 201.2R-77.
stated A1.1-c Concrete elements:
Dome; wall; basemat; ring girder; buttresses Concrete Inside or outside containment Increase in porosity and permeability, cracking, loss of material (spalling, scaling) /
Aggressive chemical attack Chapter XI.S2, ASME Section XI, Subsection IWL Accessible Areas:
Inspections performed in accordance with IWL will indicate the presence of increase in porosity and permeability, cracking, or loss of material (spalling, scaling) due to aggressive chemical attack.
Inaccessible Areas:
A plant-specific aging management program is required for below-grade exterior reinforced concrete (basemat, embedded walls), if the below-grade environment is aggressive (pH < 5.5, chlorides > 500 ppm, or sulfates >
1,500 ppm). Examination of representative samples of below-grade concrete, when excavated for any reason, is to be included as part of a Yes, a plant-specific aging manageme nt program is required for inaccessible areas as stated
4 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Item Structure and/or Component Material Environment Aging Effect/
Mechanism Aging Management Program (AMP)
Further Evaluation plant-specific program.
Note: Periodic monitoring of below-grade water chemistry (including consideration of potential seasonal variations) is an acceptable approach to demonstrate that the below-grade environment is aggressive or non-aggressive.
A1.1-d Concrete elements:
Dome; wall; basemat; ring girders; buttresses Concrete Inside or outside containment Cracking and expansion /
Reaction with aggregates Chapter XI.S2, ASME Section XI, Subsection IWL Accessible Areas:
Inspections performed in accordance with IWL will indicate the presence of cracking due to reaction with aggregates.
Inaccessible Areas:
Evaluation is needed if investigations, tests, and petrographic examinations of aggregates performed in accordance with ASTM C295-54, ASTM C227-50, or ACI 201.2R-77 (NUREG-1557) demonstrate that the aggregates are reactive.
No, if the stated conditions are satisfied for inaccessible areas A1.1-e Concrete elements:
Dome; wall; basemat; ring girders; buttresses; reinforcing steel Concrete; carbon steel Inside or outside containment Cracking, loss of bond, and loss of material (spalling, scaling) /
Corrosion of embedded steel Chapter XI.S2, ASME Section XI, Subsection IWL Accessible Areas:
Inspections performed in accordance with IWL will indicate the presence of cracking, loss of bond, and loss of material (spalling, scaling) due to Yes, a plant-specific aging manageme nt program is required for
5 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Item Structure and/or Component Material Environment Aging Effect/
Mechanism Aging Management Program (AMP)
Further Evaluation corrosion of embedded steel.
Inaccessible Areas:
A plant-specific aging management program is required for below-grade exterior reinforced concrete (basemat, embedded walls), if the below-grade environment is aggressive (pH < 5.5, chlorides > 500 ppm, or sulfates >
1,500 ppm). Examination of representative samples of below-grade concrete, when excavated for any reason, is to be included as part of a plant-specific program.
Note: Periodic monitoring of below-grade water chemistry (including consideration of potential seasonal variations) is an acceptable approach to demonstrate that the below-grade environment is aggressive or non-aggressive.
inaccessible areas as stated
6 GALL REVISION Chapter III Structures and Component Supports
7 III Structures and Component Supports A1. Group 1 Structures (BWR Reactor Bldg., PWR Shield Bldg., Control Room/Bldg.)
Item Structure and/or Component Material Environment Aging Effect/
Mechanism Aging Management Program (AMP)
Further Evaluation A1.1-a Concrete:
Exterior above and below grade; foundation Reinforced concrete Weather exposed Loss of material (spalling, scaling) and cracking /
Freeze-thaw Chapter XI.S6, Structures Monitoring Program Accessible Areas:
Inspections performed in accordance with Structures Monitoring Program will indicate the presence of loss of material (spalling, scaling) and cracking due to freeze-thaw Inaccessible Areas:
Evaluation is needed for plants that are located in moderate to severe weathering conditions (weathering index>100 day-inch/yr) (NUREG-1557).
Documented evidence to confirm that the in-place concrete had the air content between 3% to 6% and the subsequent inspections performed did not exhibit degradations related to freeze-thaw should be considered a part of the evaluation.
The weathering index for the continental US is shown in ASTM C33-90, Fig. 1.
No, if within the scope of the applicants structures monitoring program and the stated conditions are satisfied for inaccessible areas
8 A1.1-b Concrete:
Exterior above and below grade; foundation Reinforced concrete Flowing water Increase in porosity and permeability, and loss of strength /
Leaching of calcium hydroxide Chapter XI.S6, Structures Monitoring Program Accessible Areas:
Inspections performed in accordance with Structures Monitoring Program will indicate the presence of increase in porosity and permeability due to leaching of calcium hydroxide Inaccessible Areas:
A plant-specific aging management program is required for below-grade inaccessible areas (basemat and concrete wall) if the concrete is exposed to flowing water (NUREG-1557). An aging management program is not required, even if reinforced concrete is exposed to flowing water, if there is documented evidence that confirms the in-place concrete was constructed in accordance with the recommendations in ACI 201.2R-77.
No, if within the scope of the applicants structures monitoring program and a plant-specific aging manageme nt program is required for inaccessible areas as stated
9 A1.1-c Concrete:
All Reinforced concrete Any Expansion and cracking /
Reaction with aggregates Chapter XI.S6, Structures Monitoring Program Accessible Areas:
Inspections/evaluations performed in accordance with Structures Monitoring Program will indicate the presence of expansion and cracking due to reaction with aggregates.
Inaccessible Areas:
Evaluation is needed if investigations, tests, and petrographic examinations of aggregates performed in accordance with ASTM C295-54, ASTM C227-50, or ACI 201.2R-77 (NUREG-1557) demonstrate that the aggregates are reactive.
No, if within the scope of the applicants structures monitoring program and the stated conditions are satisfied for inaccessible areas A1.1-d Concrete:
Interior and above-grade exterior Reinforced concrete Exposure to aggressive environment Cracking, loss of bond, and loss of material (spalling, scaling) /
Corrosion of embedded steel Chapter XI.S6, Structures Monitoring Program Accessible Areas:
Inspections performed in accordance with Structures Monitoring Program will indicate the presence of cracking, loss of bond, and loss of material (spalling, scaling) due to corrosion of embedded steel.
No, if within the scope of the applicants structures monitoring program
10 A1.1-e Concrete:
Below-grade exterior; foundation Reinforced concrete Exposure to aggressive environment Cracking, loss of bond, loss of material (spalling, scaling) /
Corrosion of embedded steel Inaccessible Areas:
A plant-specific aging management program is required (may be a part of structures monitoring program) if the below-grade environment is aggressive (pH < 5.5, chlorides >500ppm, or sulfates > 1500 ppm). Examination of representative samples of below-grade concrete, when excavated for any reason, is to be included as part of a plant-specific program.
Note: Periodic monitoring of below-grade water chemistry (including consideration of potential seasonal variations) is an acceptable approach to demonstrate that the below-grade environment is aggressive or non-aggressive.
Yes, a plant-specific aging manageme nt program is required for inaccessible areas as stated A1.1-f Concrete:
Interior and above-grade exterior Reinforced concrete Exposure to aggressive environment Increase in porosity and permeability, cracking, loss of material (spalling, scaling) /
Aggressive chemical attack Chapter XI.S6, Structures Monitoring Program Accessible Areas:
Inspections performed in accordance with Structures Monitoring Program will indicate the presence of increase in porosity and permeability, cracking, or loss of material (spalling, scaling) due to aggressive chemical attack.
No, if within the scope of the applicants structures monitoring program
11 A1.1-g Concrete:
Below-grade exterior; foundation Reinforced concrete Exposure to aggressive environment Increase in porosity and permeability, cracking, loss of material (spalling, scaling) /
Aggressive chemical attack Inaccessible Areas:
A plant-specific aging management program is required (may be a part of structures monitoring program) if the below-grade environment is aggressive (pH < 5.5, chlorides >500 ppm, or sulfates >1500 ppm). Examination of representative samples of below-grade concrete, when excavated for any reason, is to be included as part of a plant-specific program.
Note: Periodic monitoring of below-grade water chemistry (including consideration of potential seasonal variations) is an acceptable approach to demonstrate that the below-grade environment is aggressive or non-aggressive.
Yes, a plant-specific aging manageme nt program is required for inaccessible areas as stated
12 Proposed changes to SRP NUREG-1800 (Table 3.5-1) and GALL NUREG-1801 Vol-1 (Table 5)
Table 3.5-1. Summary of Aging Management Programs for Structures and Component Supports Evaluated in Chapters II and III of the GALL Report (continued)
Type Component Aging Effect/
Mechanism Aging Management Programs Further Evaluation Recommended BWR/PWR Concrete elements:
Foundation, wall, dome Aging of accessible and inaccessible concrete areas due to leaching of calcium hydroxide, aggressive chemical attack, and corrosion of embedded steel Containment ISI Yes, a plant-specific aging management program is required for inaccessible areas as stated (see Subsection 3.5.2.2.1.1)
BWR/PWR Concrete elements:
foundation, dome, and wall Scaling, cracking, and spalling due to freeze-thaw; expansion and cracking due to reaction with aggregate Containment ISI No, if stated conditions are satisfied for inaccessible areas Class I Structures BWR/PWR All Groups except Group 6: accessible interior/exterior concrete & steel components All types of aging effects Structures Monitoring No, if within the scope of the applicants structures monitoring program and a plant-specific aging management program is required for inaccessible areas as stated (see Subsection 3.5.2.2.2.1)
BWR/PWR Groups 1-3, 5, 7-9:
inaccessible concrete components, such as exterior walls below grade and foundation Aging of inaccessible concrete areas due to aggressive chemical attack, and corrosion of embedded steel Plant-specific Yes, a plant-specific aging management program is required for inaccessible areas as stated (see Subsection 3.5.2.2.2.2)
13 TABLE 5.
SUMMARY
OF AGING MANAGEMENT PROGRAMS FOR THE STRUCTURES AND COMPONENT SUPPORTS EVALUATED IN CHAPTERS II AND III OF THE GALL REPORT (CONTINUED)
Type Component Aging Effect/
Mechanism Aging Management Programs Further Evaluation Recommended GALL Item Number PWR Concrete (Reinforced and Prestressed) and Steel Containment BWR Concrete (Mark II and III) and Steel (Mark I, II, and III) Containment BWR/
PWR Concrete elements:
foundation, dome, and wall Aging of accessible and inaccessible concrete areas due to leaching of calcium hydroxide, aggressive chemical attack, and corrosion of embedded steel Containment ISI Yes, a plant-specific aging management program is required for inaccessible areas as stated II.A1.1-b, II.A1.1-c, II.A1.1-e, II.A2.2-b, II.A2.2-c, II.A2.2-e, II.B2.2.1-a, II.B2.2.1-b, II.B2.2.1-d, II.B3.1.2-a, II.B3.1.2-b, II.B3.1.2-d, II.B3.2.1-b, II.B3.2.1-c, II.B3.2.1-e.
BWR/
PWR Concrete elements:
foundation, dome, and wall
- Scaling, cracking, and spalling due to freeze-thaw; expansion and cracking due to reaction with aggregate Containment ISI No, if stated conditions are satisfied for inaccessible areas II.A1.1-a, II.A1.1-d, II.A2.2-a, II.A2.2-d, II.B2.2.1-c, II.B3.1.2-c, II.B3.2.1-a, II.B3.2.1-d.
Class I Structures BWR/
PWR All Groups except Group 6:
accessible interior/exterior concrete and steel components All types of aging effects Structures monitoring No, if within the scope of the applicants structures monitoring program and a plant-specific aging management program is required for inaccessible areas as stated III.A1.1-a, III.A1.1-b, III.A1.1-c, III.A1.1-d, III.A1.1-f, III.A1.2-a, III.A2.1-a, III.A2.1-b, III.A2.1-c, III.A2.1-d, III.A2.1-f, III.A2.2-a, III.A3.1-a,
14 TABLE 5.
SUMMARY
OF AGING MANAGEMENT PROGRAMS FOR THE STRUCTURES AND COMPONENT SUPPORTS EVALUATED IN CHAPTERS II AND III OF THE GALL REPORT (CONTINUED)
Type Component Aging Effect/
Mechanism Aging Management Programs Further Evaluation Recommended GALL Item Number III.A3.1-b, III.A3.1-c, III.A3.1-d, III.A3.1-f, III.A3.2-a, III.A4.1-a, III.A4.1-b, III.A4.1-d, III.A4.2-a, III.A4.2-b, III.A5.1-a, III.A5.1-b, III.A5.1-c, III.A5.1-d, III.A5.1-f, III.A5.2-a, III.A7.1-a, III.A7.1-b, III.A7.1-c, III.A7.1-d, III.A7.1-f, III.A7.2-a, III.A8.1-a, III.A8.1-b, III.A8.1-c, III.A8.2-a, III.A9.1-a, III.A9.1-b, III.A9.1-c, III.A9.1-d, III.A9.1-f.
BWR/
PWR Groups 1-3, 5, 7-9:
inaccessible concrete components, such as exterior walls below grade and foundation Aging of inaccessible concrete areas due to aggressive chemical attack and corrosion of embedded steel Plant Specific Yes, a plant-specific aging management program is required for inaccessible areas as stated III.A1.1-e, III.A1.1-g, III.A2.1-e, III.A2.1-g, III.A3.1-e, III.A3.1-g, III.A5.1-e, III.A5.1-g, III.A7.1-e, III.A7.1-g, III.A8.1-e,
15 TABLE 5.
SUMMARY
OF AGING MANAGEMENT PROGRAMS FOR THE STRUCTURES AND COMPONENT SUPPORTS EVALUATED IN CHAPTERS II AND III OF THE GALL REPORT (CONTINUED)
Type Component Aging Effect/
Mechanism Aging Management Programs Further Evaluation Recommended GALL Item Number III.A8.1-g, III.A9.1-e, III.A9.1-g.