ML20072H498
| ML20072H498 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 06/30/1983 |
| From: | Byron J, Egan G APTECH ENGINEERING SERVICES |
| To: | |
| Shared Package | |
| ML20072H487 | List: |
| References | |
| NUDOCS 8306290496 | |
| Download: ML20072H498 (27) | |
Text
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AES 8210347-2 APTECH engineering services,Inc euOi~e iso cO~SuL1A~1S 795 SAN ANTONIO ROAD. PALO ALTO. CALIFORNIA 94303 (415)858 2863 RECLASSIFICATION OF FLUED HEAD FITTINGS AT MIDLAND PLANT UNITS 1 AND 2 Prepared by Jeffrey D. Byron Geoffrey R. Egan Aptech Engineering Services, Inc.
795 San Antonio Road Palo Alto, California 94303 Prepared for
~
Consumers Power Company 1945 W. Parnall Road Jackson, Michigan 49201 Attention:
Mr. Harvey Slager 8306290496 830623 PDR ADOCK 05000329 PDR June 1983 A
Services in Mechanical and Metallurgical engineering, Welding, Corrosion, Fracture Mechanics, Stress Analysis
________.__________J
VERIFICATION RECORD SHEET TITLE: Reclassification of Flued Head Fittings At Midland Plant Units 1 and 2 b~ /3' b3 Originated by:
Jeffreyd. byron /
?
Approved by:
u d
' / 7 ~b Geoffrey R. Egan Verified by:
7[.,. m c
. <,I v,. aces
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/ / - sL3 Roger H. Richman ev a
pro al:
. m, // [
/2((83 Russell C. Cipolla
Section 1
SUMMARY
AND CONCLUSIONS l
Aptech Engineering Services, Inc., performed a third-party review of the reclassification to SA-105 material of 31 installed flued head fittings. The fittings were originally classified as SA-508; however, a review of nondestructive evaluation (NDE) reports indicated that the ultrasonic (UT) in:cpection and number of tension test specimens required by SA-508 were inadequate.
We reviewed the applicable ASME Ccde and Owner's Specification against the material certification reports to determine that the fittings could b6 classi(ied as SA-105 material. Reviewing Code Case 1332-6, we concluded that SA-105 was an allowable material for this application.
Finally, we concluded that the intent of the Code is maintained in reclassifying material that has already been installed.
O
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Section 2 INTRODUCTION Aptech Engineering Services, Inc., was asked by Consumers Power Company to perform a third-party review regarding the reclassification of a number of flued head fittings in Midland Containment Buildings 1 and 2.
Our review centered on three questions:
e Is it correct to reclassify the flued heads as SA-105 material?
Is SA-105 material acceptable for the application?
e e
Is it appropriate to reclassify material once it has been installed?
~
The problem was brought to light during a review of NDE reports submitted by a vendor that indicated incomplete NDE was performed of flued head fittings (1 and 2_).
These fittings were carbon steel forgings (ordered to SA-508) that required both maoletic particle (MT) and VT for the detection of defects. The UT was inadequately performed and most heats were not tested with two tension test specimens from each forging, As a result, the fittings were improperly classified as SA-508.
This finding was not discovered until the 31 affected fittings were installed.
The proposed resolution was to reclassify the fittings as SA-105, which does not require UT inspection. APTECH was asked to review this proposed resolution.
Our review included applicable codes and specifications as well as all material certification reports and heat treatment records.
Section 3 CLASSIFICATION OF MATERIAL AS SA-105 APPLICABLE CODES AND SPECIFICATI0HS The ASME Boiler and Pressure Vessel Code (B&PV Code) applicable for Midland is the 1974 edition with no addenda.
The flued heads are classified as Class 2 components; however, the specification (3) calls for more restrictive requirements.
The ASME B&PV Code,Section III, Subsection NB for Class 1 components is the section referred to in the specification. Of particular interest is Article NB-2300 regarding the fracture toughness requirements for materials.
Other applicable Code sections used in this review included the Material Specifications SA-105 and SA-508. Material SA-105 in Table I-1.1 of Subsection NA invokes some parts of special requirement specification SA-654.
Likewise, SA-508 calls for inspections to be performed according to SA-388 and SA-275.
Finally, Code Case 1332-6 (N-1) was also utilized.
The Owner Specification was prepared by Bechtel Associates Professional Corporation.
Dated October 13, 1982, Revision 7 of Specification 7220-M-111 is the latest and reflects the changes resulting from reclassification of the flued heads (3).
The important section from the Technical Specification is Section 6.9, Impact Test Requirements.
The other owner requirements considered in our review were Drawings M300, M301, and M302 for Bechtel Job 7220.
COMPLIANCE WITH MATERIAL SPECIFICATIONS The review began with a comparison of flued head material properties with Specification SA-105.
Properties were also compared against the original specification for Material SA-508.
This comparison in Table 1 indicates that the chemical composition of all the pieces, as well as tensile strength, yield
strength, elongation, and reduction of area, are within specification for both SA-105 and SA-508. However, the SA-508 specification requires two tension test specimens for each forging where the second shall be taken at a location 180 degrees from the first.
The heat treatment, impact, and hardness requirenents are acceptable but require further discussion, which follows.
The other specification that is not met is the UT angle beam inspection requirement for SA-508.
These are the two reasons for the reclassification to l
SA-105 material.
IMPACT TESTING REQUIREMENTS The Owner Specification (3) requires that the flued heads be impact tested in accordance with Section NB-2300 of the ASME Code. Although the Material Specification SA-105 does not require impact testing, the Owner Specification is more restrictive and, therefore, applies. Subparagraph NB-2311(a)(1) allows an exclusion to testing those " materials with a nominal section thickness of 5/8 in, and less." The " nominal section thickness" is interpreted to be nominal pipe or sleeve thickness (t or t in Drawings M301
)
g 2
and M302) as these are the significantly stressed regions of the flued heads.
As shown in Table 2, all but six of the 31 flued heads have nominal thicknesses of 1/2 inch or less. Flued Head Tags 1Z12, 1Z36, 2Z3, 2Z9, 2Z12, and 2Z36 have thicknesses greater than 5/8 inches. From Drawings M301 and M302, these pieces required charpy V-notch tests at 30 F.
As can be seen from Table 1, such tests were perforned for these, as well as other pieces and resulted in acceptable values for those pieces reqyiring testing. Thus, the flued heads classified as SA-105 meet the toughness requirements set forth in the ASME Code.
l l
HARDNESS REQUIREMENTS Unlike SA-508, Material Specification SA-105 requires that a sufficient number of hardness measurements be made to assure a Brinell hardness no great'er than 187 HB for forgings that have been accelerated cooled and tempered. As can be scen from Table 1, hardness testing was performed for each heat of material.
All measured hardnesses were well below the 187 maximum value. This requirement for maximum hardness is an attempt to reduce the potential for fracture and to ensure a ductile material.
HEAT TREATMEtiT The proper heat treatment for SA-105 material shall be annealing, normalizing, or normalizing and tempering (except that forgings may be quenched in a liquid medium by agreement between the purchaser and the manufacturer).
This is much less restrictive than the heat treat?,ent requirement for SA-508.
Specification SA-508 must be liquid quenched by spraying or immersion followed by tempering at 1150 F for one-half hour per inch of maximum section thickness.
The heat treatment records for the flued heads were reviewed in two ways.
First, the records were conpared to the SA-508 specification for compliance.
The heat treatment specified in SA-508 is an acceptable SA-105 heat treatment.
Second, the times at temperature and the cooling rates were compared with those recommended for a similar material.
The heat treatment records for the five heat numbers that comprise all 31 flued head pieces are summarized in Table 3.
The specification requires that forgings be heated to a temperature which produces an austenitic structure followed by quenching and then tempering. Tempering must be at 1150 F for a minimum of 3-1/2 hours based upon a maximum section thickness of 6-1/2 inches.
As can be seen from Table 3, all heats are heat treated in accordance with Specification SA-508 and, therefore, Specification SA-105.
The material under study has chemical composition and mechanical properties that correspond closely to AISI 1030 steel. The requirements for cooling rate can be estimated from the isothermal transformation diagram for AISI 1030 steel (4) since the cnntinuous cooling diagram has not been published.
Comparison of the diagram with the cooling curves for Heats 216004 and 217531 suggests that transformation commences at about 1400 F, takes on the order of 100 seconds, and finishes at a temperature of about 1240 F.
A normalized microstructure consisting of ferrite and pearlite, in the Brinell hardness range of 156 to 180, would be anticipated.
This corresponds to ultimate tensile strengths in the range of 75 to 85 ksi. The match between predicted and measured properties also leads to the conclusion that the heat treatment conforms to SA-105 specifications.
f Section 4 f.CCEPTABILITY OF SA-105 FOR NUCLEAR APPLICATIONS Now that it has been shown that the flued heads can be classified as SA-105 material, the next step is to determine if it is an acceptable material for use as a nuclear component.
This is addressed primarily with ASME Code Case 1332-6(N-1).
Code Case 1332-6 states that:
" Forgings made of materials conforming to SA-105 or Paragraph 1, above, which have been heat treated by accelerated cooling and tempering.
(a) Mechanical Properties - In addition to the requirements' of Specification SA-105, the Brinell hardness shall not exceed 187.
For material over 3-1/2 inches in thickness, an elongation of 20 per cent shall be allowed.
(b) Welding - The material shall receive P-No.1 Gr. 2 classifi-cation in QW-422 of Section IX.
(c) The design stress intensity and allowable stress values shall be the same as listed in the applicable Tables of Section III or Table ACS-1 of Section VIII - Division 2 for SA-105 forgings."
This code case allows for the use of SA-105 in the construction of Class 1, 2, and 3 components and Class MC vessels, as long as the above requirements are met.
Heat treatment records indicate that the material was accelerated cooled by quenching either with spraying or by immersion. Brinell hardness was measured for each of the flued head pieces and found to be below the specified maximum value. The material certification reports for all the pieces indicate elongations of greater than 20%. Because the design stress values are the same as listed in Section III, the design need not be reviewed, assuming it was initially correct.
Likewise, no welding records were reviewed.
- However, the weld classification for SA-105 is the sante for SA-508 and need not be reviewed, assuming it was initially correct.
Code Case 1332-6 was annulled in January 1979.
The reason for this annullment was that Material SA-105 is now listed in Appendix I as an acceptable Class 1, 2, or 3 nuclear component material, thus, negating the need for a code case.
Since the current requirements of SA-105 are virtually the same as they were in 1974, the use of SA-105 material for Nuclear Class 1, 2, and 3 applications was and still is, accepted practice.
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e t
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Section 5 RECLASSIFICATION OF INSTALLED MATERIAL The remaining question regards the appropriateness of reclassifying material to a less restrictive grade of material after it has been installed. There is no code case that addresses this question nor would one necessarily expect there to be such a case.
The question to be addressed is, Does the reclassification meet the intent of the Code without a reduction in the assurance of safety?
W3 have shown in the preceding sections that the flued heads can be classified as SA-105 material. We have also shown that SA-105 material can be used in this application.
If the flued heads had originally been installed as SA-105 material, there would be no question about meeting the intent of the Code.
Likewise, if the components were built today as SA-105, their application would be according to the Code.
Although Subsection NA 1140(9) may advise caution when using less restrictive addenda or code cases, the fact is that the flued heads could have been originally installed as SA-105 material.
Thus, the application of Code Case 1332-6 is no less restrictive because it was applicable in 1974 at the time of construction.
There is no indication that the installed material is in any way deficient.
Magnetic particle and UT inspections have been performed indicating acceptable material. Although the UT inspection was not done according to SA-508 sp:cifications, the UT and MT inspections were in excess of SA-105 requirements. The intended assurance of safety by the Code has not been diminished.
Section 6 REFERENCES Consumers Power Company, " Safety Concern and Reportability Evaluation,"
1.
No. 59 (September 8, 1982).
Bechtel Power Corporation, " Supplier Deviation Disposition Request," SDDR 2.
No. 2822 (April 27,1983), Job No. 7220.
Bechtel Associates Professional Corporation, " Design Specification For 3.
Flued Head Fittings For Containment Penetrations For the Consumer Pcaer Company Midland Plant Units 1 and 2, Midland, Michigan," No. 722-M-111, Rev. 7 (October 13,1982).
American Society For Metals, Atlas of Isothermal and Cooling 4.
Transformation Diagrams, ASM, Metals Park, Ohio (1977), P. 10.
American Society of Mechanical Engineers, Boiler and Pressure Vessel 5.
Code,Section III (1974).
i
l Table 1 COMPARISON OF MATERIAL CERTIFICATION REPORTS TO SPECIFICATIONS ASME B&PV Code, 1974 IZ33, 1Z34 1Z50, 2Z50 215958 217531 SA-508 Class 1 SA-105 Tag Number / Heat NumbeI 9/12/77 7/20/78 Date of material certifi-cation Not specified For service pres-Quench and temper at 0
Heat treatment sure > 300 psi, 1150 F min annealing, nonna-lizing, or norma-lize and tempering 0.25 0.28 (0.08)
Chemical composition (%)
0.35 max 0.22 - 0.35 0.90 0.74 (0.07)
C (Ni) 0.60 - 1.05 0.4 - 0.9 0.013 (0.02) 0.025 Mn (Cr) 0.025 max P
(Mo) 0.025 max (0.05 max) 0.021 (0.02) 0.02 (0.001) 0.04 max S
(V) 0.15 - 0.35 0.21 0.21 0.05 max 0.35 max Si 79,000 82,000 Mechanical properties (min) 70,000 Tensile strength (psi) 70,000 46,000 49,000 Yield strength (psi) 36,000 35,000 32.0 31.0 Elongation in 2 inches (%)
22 20 61.3 57.8 Reduction of area (%)
30 38 None (N8-2300) 15 min for 3 specimens Impact (ft-lbs) 10 min for 1 specimen 162-167-162 170 - 174 Hardness (BHN, maximum) 187 None Nondestructive inspection Injurious defects Free of defects Visual Linear defect 3/16" None MT (Spec A-275)
Long wave and angle None UT beam (Spec A-388)
ddet 1 - u nlInueJJ 2Z33 2Z34 IZ5 1Z12 Tag Number / Heat Number 215960 215960 216004 216004 l
Date of material certifi-8/22/77 5/20/77 5/20/77 8/22/77 cation Heat treatment l
Chemical composition (%)
C (Ni) 0.27 0.27 (0.07) 0.28 (0.08) 0.28 Mn (Cr) 0.83 0.83 (0.09) 0.80 (0.10) 0.80 P
(Mo) 0.012 0.012 (0.05) 0.023 (0.06) 0.023 S
(V) 0.012 0.012 (0.01) 0.024 (0.01) 0.024 (0.001)
Si 0.15 0.15 0.24 0.24 Mechanical properties (min)
Tensile strength (psi) 81,000 81,000 84,000 84,000 Yield strength (psi) 51,000 51,000 56,000 56,000 Elongation in 2 inches (%)
30 30.0 28.0 28 Reduction in area (%)
69 69.0 61.1 61.1 Impact (ft-lbs) 23-27-31 23-27-31 24-31-25 (mills LE) 24-31-25 (mills LE) 10-10-10 (% shear) 10-10-10 (% shear)
Hardness (BHN, maximum) 167-172-177 167-172-177 177-178-178 177-178-178 Nondestructive inspection Visual MT UT
(TAiLE 1 - Continued) 1Z48, 2Z48 1Z69, 1Z86 1Z80, 1Z81 2Z5, 2Z12 Tag Number / Heat Number 216004 216004 216004 216004 Date of material certifi-6/22/77 5/20/77 5/20/77 5/20/77 cation Heat treatment Chemical composition (%)
~0.28 (0.08) 0.28 (0.08) 0.28 (0.08)
C (Ni) 0.28 (0.08)
Mn (Cr) 0.80 (0.10) 0.80 (0.10) 0.80 (0.10) 0.80 (0.10)
P (fio) 0.023 (0.06) 0.023 (0.06) 0.023 (0.06).
0.023 (0.06)
S (V) 0.024 (0.01) 0.024 (0.01) 0.024 (0.01) 0.024 (0.01)
Si 0.24 0.24 0.24 0.24 Mechanical properties (min)
Tensile strength (psi) 87,000 88,000 85,000 84,000 Yield strength (psi) 59,000 57,000 54,000 56,000 Elongation in 2 inches (%)
27.0 24.0 29.0 28.0 Reduction in area (%)
59.1 42.8 64.7 61.1 Impact (ft-lbs) 23-27-31 24-31-25 (mills LE) 10-10-10 (% shecr)
Hardness (BHN, maximum) 77-178-178 177-178-178 167-163-163 177-178-178 Nondestructive inspection Visual MT UT
7 _ _ __
2Z69, 2Z86 2Z80, 2281 1Z36 Tag Number / Heat Number 216004 216004 536896-2B Date of material certifi-5/20/77 5/20/77 4/1/77 cation Heat treatment Chemical composition (%)
C (Ni) 0.28 (0.08) 0.28 (0.08) 0.288 Mn (Cr) 0.80 (0.10) 0.80 (0.10) 0.77 P
(Mo) 0.023 (0.06) 0.023 (0.06) 0.012 S
(V) 0.024 (0.01) 0.024 (0.01) 0.024 (0.002)
Si 0.24 0.24 0.32 Mechanical properties (min)
Tensile strength (psi) 88,000 85,000 80,000; 80,500 Yield strength (psi) 57,000 54,000 48,500; 49,500 Elongation in 2 inches (%)
24.0 29.0 33; 31 Reduction in area (%)
42.8 64.7 66.5; 66.5 Impact (ft-lbs) 28-35-34; 37-24-42 21-31-25; 28-21-35 (mills LE) 20-25-25; 30-20-30 (% shear)
Hardness (BHN, maximum) 165-163-162 172-178-167 159; 159 Nondestructive inspection Visual MT UT t
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[iaLd 1 LulII.II6 Leo /
1Z42 IZ43 1Z71 1Z73 Tag Number / Heat Number 536896-3B 536896-3M1 536896-2M2 536896-2M4 l
Date of material certifi- -
3/31/77 3/31/77 3/31/77 4/1/77 cation Heat treatment Chemical composition (%)
C (Ni) 0.275 "Same as 0.285 0.285 Mn (Cr) 0.75 IZ42" 0.77 0.76 P
(Mo) 0.012 0.012 0.013 S
(V) 0.024 (0.002) 1 0.024 (0.002) 0.024 (0.002)
Si 0.31 0.32 0.33 Mechanical properties (min)
Tensile strength (psi) 78,000 "Same as 77,500 76,500; 76,000 Yield strength (psi) 49,500 1Z42" 50,000 47,000; 47,500 Elongation in 2 inches (%)
32.5 30 32.0; 32.0 Reduction in area (%)
69 69 68.0; 69.0 11-18-22 28-20-35; 36-15-14 Impact (ft-lbs)
Hardness (BHN, maximum) 156 Same as 1Z42" 156 149; 149 Nondestructive inspection Visual MT UT e
(TABLE'l'- ConU nued) 2Z3 2Z9 Tag Number / Heat Number 536896-1B 536896-1M1 Date of material certifi-5/2/77 5/2/77 cation Heat treatment Chemical composition (%)
C (Ni) 0.28; 0.28 0.28; 0.29 Mn (Cr) 0.75; 0.77
~
0.75; 0.76 P
(Mo) 0.010; 0.012 0.010; 0.012 S
(V) 0.024; 0.024 (0.0035; 0.002) 0.024; 0.024 (0.0035; 0.002)
Si 0.31; 0.32 0.31; 0.33 Mechanical properties (min)
Tensile strength (psi) 80,000; 81,000 82,500; 83,500 Yield strength (psi) 61,500; 59,000 52,000; 54,500 Elongation in 2 inches.
30; 30 29.5; 30.0 Reduction in area (%)
67; 67 63.5; 67 Impact (ft-lbs) 42-44-43; 41-44-42 26-28-32;, 36-50-44 35-34-35; 34-35-35 (mills LE) 34-35-35; 29-40-32 (mills LE) 30-30-30; 30-30-30 (% shear) 30-30-30; 30-35-30 (% shear)
Hardness (BHN, maximum) 179; 179 179; 179 Nondestructive inspection Visual MT UT
(ldLE1-Continu@d) 2Z36 2Z42 2Z71 2Z73 Tag Number / Heat Number 536896-2M1 536896-3M2 536896-2M3 536896-2T Date of material certifi-4/1/77 3/31/77 3/31/77 4/1/77 cation Heat treatment Chemical composition (%)
C (Ni) 0.285 "Same as 0.285 0.285 Mn (Cr) 0.77 1Z42" 0.76 0.77 P
(Mo) 0.012 0.013 0.012 S
(V) 0.024 (0.002) 0.024 (0.002) 0.024 (0.002)
Si 0.32 0.33 0.32 s
Mechanical properties (min)
Tensile strength (psi)
"Same as 82,000 79,000 "Same as Yield strength (psi) 1Z36" 51,500 49,500 IZ73" Elongation in 2 inches (psi) 30 31 Reduction in area (%)
65.5 66.5 35-20-37 Impact (ft-lbs)
Hardness (BHN, maximum) 156 156 1
)
Nondestructive inspection i
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- Heat treatment per order specification o*Per TT06-086, Rev. 0
- *Per TT04-037, Rev. 1 - straight beam only.
ON*Per UT-038-198, Rev.1 - for information l
l L- - __-_
d Table 2
SUMMARY
OF FLUED HEADS TO BE IMPACT TESTED t1 t2 Nominal Nominal Sleeve 4
Pipe x Sleeve Pipe Thickness Thickness Impact Test Tag Number Size (inch)
(inch)
Temperature 1Z-5 Spare (capped) 1Z-12 2" x 16" 0.656 300F 1Z-33 48" x 60" 0.375 0.500 N/A 1Z-34 48" x 60" 0.375 0.500 N/A i
1Z-36 6" x 16" 0.432 0.656 300F 1Z-42 2 " x 12" 0.203 0.375 N/A 1Z-43 2h" x 12" 0.203 0.375 N/A 1Z-48 Spare (capped) 12-50 4" x 12" 0.237 0.375 N/A 1Z-69 Spare (capped) 1Z-71 6" x 12" 0.432 0.375 N/A IZ-73 6" x 12" 0.432 0.375 N/A 1Z-80 18" x 30" 0.375 0.500 N/A 1Z-81 18" x 30" 0.375 0.500 N/A 1Z-86 4" x 12" 0.237 0.375 N/A 2Z-3 12" x 16 "
0.375 0.781 300F 2Z-5 Spare (capped) 2Z-9 10" x 16 "
0.365 0.656 300F 2Z-12 2" x 16" 0.656 300F 2Z-33 48" x 60" 0.375 0.500 N/A 2Z-34 48" x 60" 0.375 0.500 N/A
/
2Z-36 6" x 16" 0.432 0.656 300F 2Z-42 2h" x 12" 0.203 0.375 N/A 2Z-48 1" spare 2Z-50 4" x 12" 0.237 0.375 "N/A 2Z-69 Spare (capped) 2Z-71 6" x 12" 0.432 0.375 N/A 2Z-73 6" x 12" 0.432 0.375 N/A 2Z-80 18" x 30" 0.375 0.500 N/A 2Z-81 18 x 30" 0.375 0.500 N/A 2Z-86 4" x 12" 0.237 0.375 N/A
Table 3 HEAT TREATMENT RECORDS FOR FLUED HEADS Austenitizing Tempering Temperature Time Temperature Time Heat Number (OF)
(Hours)
(OF)
(Hours) 217531 1650 3
1200 5
)
215958 1650 6
1150 6
1 215960 1650 8
1200 8
(
216004 536896 1600-1625 22 1160-1:30 8
4 I
1 l
1 l-l 1
l t
1
4 1
PERMISSABLE LOWEST SERVICE METAL TEMPERATUPIS FOR FLUED HEAD PENETRATIONS BEING CONSIDERED FOR RECLASSIFICATION AS SA-105 MATERIAL Axial (I)
()
LST(3)
Penetration Thickness LST-TNDT Number (In)
F 12-33, 1Z-34 3-3/4" 48 58*
40*
50*
2Z-5, 2Z-12 12-80, 1Z-81 2-3/4" 35*
45*
2Z-80, 2Z-81 1Z-48, 2Z-48 2-1/2" 30*
40*
40*
IZ-36, 12-42 2"
30*
40*
1Z-43, 1Z-50 1Z-69, 1Z-86 2Z-36, 2Z-42 2Z-50, 2Z-69 2Z-86 12-71, 1Z-73 1-7/8" 30*
40*
1.
The Axial Thickness is the "H" dimension or equivalent on Drawings M-301 and M-302.
2.
The LST - T temperature adjustment is from Figure NC-2311(a)-1 in the ASMESectionIIICode.
ND The Lowest Service Temperature is computed using an assumed value of +10 F rT fr m Table NC-2311(a)-1 in the ASME Section III Code. This +10 F NDT alue is for SA-508 Class 1 Material. Lower values for T~YDT " "Id #*9"i#*
astification.
f INTERIM TECHNICAL REPORT 38 REVISION 2 k
i l
FINAL REPORT ON CONSTRUCTION QUALITY ASSURANCE EVALUATION.OF WISMER & BECKER A STONE a wasSTan sNaiNeeniNo COneOaAriON