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
GALL REVISION Chapter II Containment Structures Enclosure 2
2 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Structure and/or Aging Effect/ Further Item Component Material Environment Mechanism Aging Management Program (AMP) Evaluation A1.1-a Concrete elements: Concrete Outside Loss of material Chapter XI.S2, ASME Section XI, No, if the containment (spalling, scaling) Subsection IWL stated Dome; wall; basemat; ring and cracking / conditions girder; buttresses Freeze-thaw Accessible Areas: are satisfied Inspections performed in accordance for with IWL will indicate the presence of inaccessible loss of material (spalling, scaling) and areas 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.
A1.1-b Concrete elements: Concrete Outside Increase in Chapter XI.S2, ASME Section XI, Yes, a containment porosity, Subsection IWL plant-Dome; wall; basemat; ring permeability, and specific girder; buttresses loss of strength/ Accessible Areas: aging Leaching of Inspections performed in accordance manageme calcium hydroxide with IWL will indicate the presence of nt program increase in porosity, and permeability is required due to leaching of calcium hydroxide. for inaccessible areas as
3 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Structure and/or Aging Effect/ Further Item Component Material Environment Mechanism Aging Management Program (AMP) Evaluation Inaccessible Areas: stated 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.
A1.1-c Concrete elements: Concrete Inside or Increase in Chapter XI.S2, ASME Section XI, Yes, a outside porosity and Subsection IWL plant-Dome; wall; basemat; ring containment permeability, specific girder; buttresses cracking, loss of Accessible Areas: aging material (spalling, Inspections performed in accordance manageme scaling) / with IWL will indicate the presence of nt program Aggressive increase in porosity and permeability, is required chemical attack cracking, or loss of material (spalling, for scaling) due to aggressive chemical inaccessible attack. areas as stated 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
4 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Structure and/or Aging Effect/ Further Item Component Material Environment Mechanism Aging Management Program (AMP) 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: Concrete Inside or Cracking and Chapter XI.S2, ASME Section XI, No, if the outside expansion / Subsection IWL stated Dome; wall; basemat; ring containment Reaction with conditions girders; buttresses aggregates Accessible Areas: are satisfied Inspections performed in accordance for with IWL will indicate the presence of inaccessible cracking due to reaction with areas 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.
A1.1-e Concrete elements: Concrete; Inside or Cracking, loss of Chapter XI.S2, ASME Section XI, Yes, a carbon outside bond, and loss of Subsection IWL plant-Dome; wall; basemat; ring steel containment material (spalling, specific girders; buttresses; reinforcing scaling) / Accessible Areas: aging steel Corrosion of Inspections performed in accordance manageme embedded steel with IWL will indicate the presence of nt program cracking, loss of bond, and loss of is required material (spalling, scaling) due to for
5 II Containment Structures A1. PWR Concrete Containments (Reinforced and Prestressed)
Structure and/or Aging Effect/ Further Item Component Material Environment Mechanism Aging Management Program (AMP) Evaluation corrosion of embedded steel. inaccessible areas as Inaccessible Areas: stated 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.
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.)
Structure and/or Aging Effect/ Further Item Component Material Environment Mechanism Aging Management Program (AMP) Evaluation A1.1-a Concrete: Reinforced Weather Loss of material Chapter XI.S6, Structures Monitoring No, if within Exterior above and below concrete exposed (spalling, scaling) Program the scope of grade; foundation and cracking / the Freeze-thaw Accessible Areas: applicants Inspections performed in accordance structures with Structures Monitoring Program monitoring will indicate the presence of loss of program material (spalling, scaling) and cracking and the due to freeze-thaw stated conditions Inaccessible Areas: are satisfied Evaluation is needed for plants that are for located in moderate to severe inaccessible weathering conditions (weathering areas 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.
8 A1.1-b Concrete: Reinforced Flowing water Increase in Chapter XI.S6, Structures Monitoring No, if within Exterior above and below concrete porosity and Program the scope of grade; foundation permeability, and the loss of strength / Accessible Areas: applicants Leaching of Inspections performed in accordance structures calcium hydroxide with Structures Monitoring Program monitoring will indicate the presence of increase in program porosity and permeability due to and a plant-leaching of calcium hydroxide specific aging Inaccessible Areas: manageme A plant-specific aging management nt program program is required for below-grade is required inaccessible areas (basemat and for concrete wall) if the concrete is inaccessible exposed to flowing water (NUREG- areas as 1557). An aging management program stated 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.
9 A1.1-c Concrete: Reinforced Any Expansion and Chapter XI.S6, Structures Monitoring No, if within All concrete cracking / Program the scope of Reaction with the aggregates Accessible Areas: applicants Inspections/evaluations performed in structures accordance with Structures Monitoring monitoring Program will indicate the presence of program expansion and cracking due to reaction and the with aggregates. stated conditions Inaccessible Areas: are satisfied Evaluation is needed if investigations, for tests, and petrographic examinations of inaccessible aggregates performed in accordance areas with ASTM C295-54, ASTM C227-50, or ACI 201.2R-77 (NUREG-1557) demonstrate that the aggregates are reactive.
A1.1-d Concrete: Reinforced Exposure to Cracking, loss of Chapter XI.S6, Structures Monitoring No, if within Interior and above-grade concrete aggressive bond, and loss of Program the scope of exterior environment material (spalling, the scaling) / Accessible Areas: applicants Corrosion of Inspections performed in accordance structures embedded steel with Structures Monitoring Program monitoring will indicate the presence of cracking, program loss of bond, and loss of material (spalling, scaling) due to corrosion of embedded steel.
10 A1.1-e Concrete: Reinforced Exposure to Cracking, loss of Inaccessible Areas: Yes, a Below-grade exterior; concrete aggressive bond, loss of A plant-specific aging management plant-foundation environment material (spalling, program is required (may be a part of specific scaling) / structures monitoring program) if the aging Corrosion of below-grade environment is aggressive manageme embedded steel (pH < 5.5, chlorides >500ppm, or nt program sulfates > 1500 ppm). Examination of is required representative samples of below-grade for concrete, when excavated for any inaccessible reason, is to be included as part of a areas as plant-specific program. stated 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-f Concrete: Reinforced Exposure to Increase in Chapter XI.S6, Structures Monitoring No, if within Interior and above-grade concrete aggressive porosity and Program the scope of exterior environment permeability, the cracking, loss of Accessible Areas: applicants material (spalling, Inspections performed in accordance structures scaling) / with Structures Monitoring Program monitoring Aggressive will indicate the presence of increase in program chemical attack porosity and permeability, cracking, or loss of material (spalling, scaling) due to aggressive chemical attack.
11 A1.1-g Concrete: Reinforced Exposure to Increase in Inaccessible Areas: Yes, a Below-grade exterior; concrete aggressive porosity and A plant-specific aging management plant-foundation environment permeability, program is required (may be a part of specific cracking, loss of structures monitoring program) if the aging material (spalling, below-grade environment is aggressive manageme scaling) / (pH < 5.5, chlorides >500 ppm, or nt program Aggressive sulfates >1500 ppm). Examination of is required chemical attack representative samples of below-grade for concrete, when excavated for any inaccessible reason, is to be included as part of a areas as plant-specific program. stated 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.
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)
Aging Aging Effect/ Management Further Evaluation Type Component Mechanism Programs Recommended BWR/PWR Concrete elements: Aging of accessible Containment ISI Yes, a plant-Foundation, wall, and inaccessible specific aging dome concrete areas due management to leaching of program is required calcium hydroxide, for inaccessible aggressive chemical attack, and corrosion areas as stated of embedded steel (see Subsection 3.5.2.2.1.1)
BWR/PWR Concrete elements: Scaling, cracking, Containment ISI No, if stated foundation, dome, and and spalling due to conditions are wall freeze-thaw; satisfied for expansion and inaccessible areas cracking due to reaction with aggregate Class I Structures BWR/PWR All Groups except All types of aging Structures No, if within the Group 6: accessible effects Monitoring scope of the interior/exterior applicants structures concrete & steel monitoring program components 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: Aging of Plant-specific Yes, a plant-inaccessible concrete inaccessible specific aging components, such as concrete areas due management exterior walls below to aggressive program is required grade and foundation chemical attack, and for inaccessible corrosion of embedded steel 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)
Aging Further Aging Effect/ Management Evaluation GALL Type Component Mechanism Programs Recommended 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/ Concrete Aging of Containment Yes, a plant- II.A1.1-b, PWR elements: accessible and ISI specific aging II.A1.1-c, foundation, inaccessible management II.A1.1-e, dome, and wall concrete areas program is II.A2.2-b, due to leaching required for II.A2.2-c, of calcium hydroxide, inaccessible II.A2.2-e, aggressive areas as stated II.B2.2.1-a, chemical attack, II.B2.2.1-b, and corrosion of II.B2.2.1-d, embedded steel 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/ Concrete Scaling, Containment No, if stated II.A1.1-a, PWR elements: cracking, and ISI conditions are II.A1.1-d, foundation, spalling due to satisfied for II.A2.2-a, dome, and wall freeze-thaw; inaccessible II.A2.2-d, expansion and areas cracking due to II.B2.2.1-c, reaction with II.B3.1.2-c, aggregate II.B3.2.1-a, II.B3.2.1-d.
Class I Structures BWR/ All Groups All types of aging Structures No, if within the III.A1.1-a, PWR except Group 6: effects monitoring scope of the III.A1.1-b, accessible applicants III.A1.1-c, interior/exterior structures III.A1.1-d, concrete and monitoring steel program and a III.A1.1-f, components III.A1.2-a, plant-specific aging III.A2.1-a, management III.A2.1-b, program is III.A2.1-c, required for III.A2.1-d, inaccessible III.A2.1-f, areas as stated 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)
Aging Further Aging Effect/ Management Evaluation GALL Type Component Mechanism Programs Recommended 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/ Groups 1-3, 5, Aging of Plant Specific Yes, a plant- III.A1.1-e, PWR 7-9: inaccessible specific aging III.A1.1-g, inaccessible concrete areas management III.A2.1-e, concrete due to program is III.A2.1-g, components, aggressive required for III.A3.1-e, such as chemical attack and corrosion of inaccessible III.A3.1-g, exterior walls areas as stated embedded steel III.A5.1-e, below grade III.A5.1-g, and foundation 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)
Aging Further Aging Effect/ Management Evaluation GALL Type Component Mechanism Programs Recommended Item Number III.A8.1-g, III.A9.1-e, III.A9.1-g.