ML15331A202: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
 
(2 intermediate revisions by the same user not shown)
Line 2: Line 2:
| number = ML15331A202
| number = ML15331A202
| issue date = 06/04/2014
| issue date = 06/04/2014
| title = Official Exhibit - NYS000518-00-BD01 - Kirk, Mark and Sheng, Simon, Usnrc, Assessment of BTP 5-3 Protocols to Estimate Rtndt(U) and Use, (June 4, 2014) (ML14163A524)
| title = Official Exhibit - NYS000518-00-BD01 - Kirk, Mark and Sheng, Simon, USNRC, Assessment of BTP 5-3 Protocols to Estimate Rtndt(U) and Use, (June 4, 2014) (ML14163A524)
| author name =  
| author name =  
| author affiliation = State of NY, Office of the Attorney General
| author affiliation = State of NY, Office of the Attorney General
Line 16: Line 16:


=Text=
=Text=
{{#Wiki_filter:Assessment of BTP 5
{{#Wiki_filter:United States Nuclear Regulatory Commission Official Hearing Exhibit In the Matter of:                    Entergy Nuclear Operations, Inc.
-3 Protocols to Estimate RTNDT(u) and USE Mark Kirk Simon Sheng Senior Materials Engineer Senior Materials Engineer RES/DE/CIB NRR/DE/EVIB mark.kirk@nrc.gov simon.sheng@nrc.gov
(Indian Point Nuclear Generating Units 2 and 3)
ASLBP #: 07-858-03-LR-BD01 Docket #: 05000247 l 05000286 Exhibit #: NYS000518-00-BD01                Identified: 11/5/2015                              NYS000518 Admitted: 11/5/2015                        Withdrawn:
Rejected:                                      Stricken:
Submitted: June 9, 2015 Other:
ML14163A524
Assessment of BTP 5-3 Protocols to Estimate RTNDT(u) and USE Mark Kirk                                   Simon Sheng Senior Materials Engineer                             Senior Materials Engineer RES/DE/CIB                                     NRR/DE/EVIB mark.kirk@nrc.gov                               simon.sheng@nrc.gov NRC/EPRI Annual Materials Issue Program Information Exchange Meeting 4th June 2014 Rockville, Maryland, USA


NRC/EPRI Annual Materials Issue Program Information Exchange Meeting 4 th June 2014 Rockville, Maryland, USA
Outline of Presentation
* Un-Irradiated RTNDT (RTNDT(u)) & Un-Irradiated Upper Shelf Energy (USE) definitions & estimates
* Background of questions concerning BTP 5-3
* Staff Assessment Part I - Technical evaluation of BTP 5-3 estimation of RTNDT(u) & USE
* Staff Assessment Part I - Potentially Affected Plants
* Next steps


Outline of Presentation Un-Irradiated RTNDT (RTNDT(u)) & Un-Irradiated Upper Shelf Energy (USE) definitions & estimates Background of questions concerning BTP 5-3 Staff Assessment Part I - Technical evaluation of BTP 5-3 estimation of RTNDT(u) & USE  Staff Assessment Part I - Potentially Affected Plants Next steps
Definitions: RTNDT(u) & USE Specimens notched transverse to RD USE  average of all energies > 95%
shear per ASTM E185-82 RT NDT(u)= MAX {T NDT , T35 / 50 60}
per ASME NB-2331 Break: Crack                      No-Break: Fracture completely severs                (darkened region) does tension surface of                not extend to the sides specimen.                        of the specimen Temperature NDT is the lowest temperature of no-break performance


TemperatureNDT is the lowest temperature of "no
RTNDT(u) & USE Estimated by NUREG-0800 BTP 5-3 Approximations Position 1.1(4)
-break" performance No-Break:  Fracture (darkened region) does not extend to the sides of the specimenBreak:  Crack completely severs tension surface of specimen.
Positions 1.1(1) & 1.1(2)
60,50/35TTMAXRTNDTNDT(u) Specimens notched transverse to RD Definitions: RTNDT(u) & USE per ASME NB
-2331 per ASTM E185
-82 USE  average of all energies > 95% shear RTNDT(u) & USE Estimated by NUREG
-0800 BTP 5-3 60,50/35TTMAXRTNDTNDT(u) per ASME NB
-2331 per ASTM E185
-82 USE  average of all energies > 95% shear Position 1.2 Positions 1.1(1) & 1.1(2)
Position 1.1(3)
Position 1.1(3)
Position 1.1(4)
RT NDT(u)= MAX {T NDT , T35 / 50  60}
Approximations
per ASME NB-2331 Position 1.2 USE  average of all energies > 95%
shear per ASTM E185-82


AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014
Background of Questions Concerning BTP 5-3
-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings Literature search reveals 1983  
* AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
* Literature search reveals 1983 EG&G report & 1985 IJPVP paper
  - Evaluation of BTP 5-3 (then MTEB 5-2) for NRC
  - Conclusions
* Always conservative
        - Position 1.1(1): estimates TNDT
        - Position 1.1(2): estimates TNDT
* Sometime non-conservative
        - Position 1.1(3): estimates TCVE(50/35)
        - Position 1.1(4): estimates RTNDT
        - Position 1.2: estimates USE


EG&G report & 1985 IJPVP paper -Evaluation of BTP 5
Background of Questions Concerning BTP 5-3
-3 (then   MTEB 5-2) for NRC
* AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
-Conclusions Always conservative
* Literature search reveals 1983 EG&G report & 1985 IJPVP paper
-Position 1.1(1): estimates TNDT -Position 1.1(2): estimates TNDT Sometime non
  - Evaluation of BTP 5-3 (then MTEB 5-2) for NRC
-conservative
  - Conclusions
-Position 1.1(3): estimates TCVE(50/35)
* Always conservative
-Position 1.1(4): estimates RTNDT -Position 1.2: estimates USE Background of Questions Concerning BTP 5-3 AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014
        - Position 1.1(1): estimates TNDT
-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings Literature search reveals 1983
        - Position 1.1(2): estimates TNDT
* Sometime non-conservative
        - Position 1.1(3): estimates TCVE(50/35)
        - Position 1.1(4): estimates RTNDT
        - Position 1.2: estimates USE


EG&G report & 1985 IJPVP paper -Evaluation of BTP 5
NRC Staff Assessment Process Part I: Technical evaluation of BTP                Part II: Assessment of 5-3 estimation of RTNDT(u) and USE                applicability to plants
-3 (then    MTEB 5-2) for NRC
* Data sources
-Conclusions Always conservative
* Query RVID
-Position 1.1(1): estimates TNDT -Position 1.1(2): estimates TNDT  Sometime non
    - Processed data (T50, USE, ) from                - RTNDT(u): establishes BTP 5-3 1983 EG&G report                                   use, but not which position was
-conservative
    - Raw data (CVE, MLE, temp) in                        used both specimen orientations from                - USE: establishes BTP 5-3 use surveillance reports (stored in REAP)
-Position 1.1(3): estimates TCVE(50/35)
* Search for documents
-Position 1.1(4): estimates RTNDT -Position 1.2: estimates USE Background of Questions Concerning BTP 5-3 Part II: Assessment of  applicability to plants Query RVID
    - Raw data (NDTT) from RVID refs.                referenced by RVID in ADAMS legacy
-RTNDT(u): establishes BTP 5-3 use, but not which position was used -USE: establishes BTP 5
* Focus on                                            - Focus on plants closest to PTS
-3 use  Search for documents
    - Plates & forgings only                              (50.61) limit, these being most
* No plants have used BTP 5-3 for                prone to influence by potential welds                                          non-conservatisms
    - Positions identified as sometimes                - References establish which non-conservative in 1983 by                        position of BTP 5-3 was used EG&G report                                        for RTNDT(u)
* Position 1.1(3): estimates TCVE(50/35)
* Position 1.1(4): estimates RTNDT
* Position 1.2: estimates USE


referenced by RVID in ADAMS legacy -Focus on plants closest to PTS
Part I: Technical Evaluation Overview
* Data sources
* While similar answers are expected from both sources
  - Processed data (T50, USE, )
* Given the potential impact of this evaluation, going from 1983 EG&G report                                                    back to the raw data was seen to be important.
  - Raw data (CVE, MLE, temp)                                      150 A508-2: Heat 527536 from surveillance reports                                                Longitudinal 125 (stored in REAP)
  - Raw data (NDTT) from RVID                                       100 refs.                                                          75 Impact Energy [ft-lbs]
* Focus on                                                           50 tanh Fit
  - Plates & forgings only                                          25 Data
* No plants have used BTP 5-3                                  0 150 for welds Transverse
  - Positions identified as                                        125 sometimes non-conservative                                      100 by 1983 EG&G report                                                                              130°F                  47%
* Position 1.1(3): estimates                                  75 TCVE(50/35)                                                  50
* Position 1.1(4): estimates RTNDT                                                      28%
25%                                      tanh Fit
* Position 1.2: estimates USE                                  25 43%            Data 0
                                                                        -200          -100        0          100      200              300 Temperature [°F]


(50.61) limit, these being most prone to influence by potential non-conservatisms
Position 1.1(3)
-References establish which
Quotation                                        Tests Required If transversely-oriented Charpy V-notch          Longitudinally oriented CVN specimens specimens were not tested, the temperature at which 68 J (50 ft-lbs) and        Clear Interpretation 0.89 mm (35 mils) LE would have been              Note that this position applies only to conversion between longitudinal obtained on transverse specimens may              and transverse Charpy values.
be estimated by one of the following              There are two approximations. They may not produce the same criteria:                                        results. They are as follows
      - Test results from longitudinally-oriented specimens reduced to 65% of their      (a)    ETRANS = 0.65xELONG, then calc TC(TRANS) value to provide conservative estimates        MLETRANS = 0.65xMLELONG, then calc TC(TRANS-MLE) of values expected from transversely oriented specimens.                    (b)    TC(TRANS) = TC(LONG) + 20 °F
      - Temperatures at which 68 J (50 ft-lbs)            TC(TRANS-MLE = TC(LONG-MLE) + 20 °F and 0.89 mm (35 mils) LE were obtained on longitudinally-oriented specimens    where increased 11 °C (20 °F) to provide a            ELONG          is CVN energy measured by a longitudinally conservative estimate of the                                    oriented specimen temperature that would have been                ETRANS          is the estimated CVN for a transversely oriented necessary to obtain the same values on                          specimen transversely-oriented specimens.                TC(LONG)        is the temperature at which the minimum of three longitudinal CVN tests exhibits >35 mils AND >50 ft-lbs TC(TRANS)      is the estimated temperature at which the minimum of three transverse CVN tests exhibits
                                                                          >35 mils AND >50 ft-lbs


position of BTP 5
Position 1.1(3)
-3 was used for RTNDT(u) Part I: Technical evaluation of BTP 5-3 estimation of RTNDT(u) and USE D ata sources -Processed data (T50, USE, -) from 1983 EG&G report
Assessing(a): Trans = 0.65xLong
-Raw data (CVE, MLE, temp) in
: 1. Per the BTP, reduce longitudinal measurements to                Longitudinal 65% of the measured values Energy
: 2. Fit Charpy curves
      - Energy vs. temperature                                      Transverse =
      - Lateral expansion vs.                                    0.65xLongitudinal temperature Temperature
: 3. Determine MAX(T50ft-lb, T35mills)
: 4. Value from Step 3 estimates the transition temperature of transverse data


both specimen orientations from surveillance reports (stored in REAP) -Raw data (NDTT) from RVID refs.
Position 1.1(3)
Focus on -Plates & forgings only No plants have used BTP 5
Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200          Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall                          Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall 1.0 Transverse T50 Estimate Error [°F]
-3 for welds -Positions identified as sometimes
Plate                                                                              0.9 150 Forging                                                                            0.8 BTP 5-3 Position 1.1(3) (+20F)                                                    0.7 100 Percentile 0.6 50                                        Non-conservative                                    0.5 0.4 0
0.3 Non-conservative 0.2                                      Plate
                                    -50 Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)
                            -100                                                                                                    0.0
                                          -50  -25        0        25        50        75        100        125                    -100  -50        0          50          100          150            200 Trans T50 est. from Longx0.65 [°F]                                                      Transverse T50 Estimate Error [°F]
Position is non-conservative about 36% of the time EG&G Data


n on-conservative in 1983 by EG&G report Position 1.1(3): estimates TCVE(50/35)
Position 1.1(3)
Position 1.1(4): estimates RTNDT Position 1.2:  estimates USE NRC Staff Assessment Process
Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200            Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall                1.0          Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall Trans. T50ft-lbs&35mills Estimate Error [°F]
Plate                                                0.9 150                                        Forging                                              0.8 BTP 5-3 Position 1.1(3) (0F)                          0.7 100 Percentile 0.6 50                                           Non-conservative                                    0.5 0.4 0                                                                                              0.3 Non-conservative 0.2                                            Plate
                                              -50                                                                                                                                            Forging 0.1 BTP 5-3 Position 1.1(3) (0F)
                                    -100                                                                                                      0.0
                                                    -50    -25      0        25        50        75        100        125                    -100      -50        0          50          100          150            200 Trans. T50ft-lbs&35mills est. from Longx0.65 [°F]                                              Transverse T50ft-lbs&35mills estimate error [°F]
T50ft-lbs determines the value of T50ft-lbs&35mills
* 81% of the time for longitudinal specimens
* 92% of the time for transverse specimens Position is non-conservative about 30% of the time Raw Data


Part I: Technical Evaluation Overview While similar answers are expected from both sources -  Given the potential impact of this evaluation,  going
Position 1.1(3)
Assessing(b): Alternative TC(TRANS) Estimates 250                    Mean: T50T = 0.72xT50(e) + 12.5 Bound: T50T = 0.72xT50(e)- 27.5 Plate & Forging 200        Outlier (excluded)
Mean Transverse T50 [°F]
150        Lower Bound 100 50 0
                                  -50
                              -100
                                        -50   -25        0          25          50        75        100        125 Trans. T50 from Longx0.65[°F]
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                    EG&G Data


back to the raw data was seen to be important.
Position 1.1(3)
Data sources
Assessing(a): Alternative TC(TRANS) Estimates 250            Mean: T50&35T = 0.66xT50&35(e) + 13 Bound: T50&35T = 0.66xT50&35(e) - 34 Plate & Forging Transverse T50ft-lbs&35mills [°F]
-Processed data (T50, USE, -) from 1983 EG&G report
200 Mean Lower Bound 150 100 50 0
-Raw data (CVE, MLE, temp) from surveillance reports (stored in REAP)
                                                -50
-Raw data (NDTT) from RVID
                                        -100
                                                      -50    -25        0          25          50        75        100        125 Trans. T50ft-lb&35mills est. from Longx0.65 [°F]
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                                      Raw Data


refs. Focus on -Plates & forgings only No plants have used BTP 5
Position 1.1(3)
-3    for welds -Positions identified as
Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200          Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall                1.0          Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall Transverse - Longitudinal T50 [°F]
0.9 150 0.8 0.7 100 Percentile 0.6 Non-conservative 50                                                                                            0.5 0.4 0
0.3 Non-conservative Plate                                                  0.2                                          Plate
                                    -50                                    Forging                                                                                            Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)                                                                      BTP 5-3 Position 1.1(3) (+20F)
                            -100                                                                                                    0.0
                                          -50  -25      0        25        50        75        100        125                        -100  -50        0          50        100          150            200 Longitudinal T50 [°F]                                                              Transverse - Longitudinal T50 [°F]
Position is non-conservative about two-thirds of the time EG&G Data


sometimes non
Position 1.1(3)
-conservative by 1983 EG&G report Position 1.1(3): estimates
Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200          Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall                1.0              Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall 0.9 Trans. - Longl. T50ft-lbs&35mills [°F]
150                                                                                            0.8 0.7 100 Percentile 0.6 Non-conservative 50                                                                                            0.5 0.4 0                                                                                            0.3 Non-conservative Plate                                                  0.2                                              Plate
                                        -50                                    Forging                                                                                                Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)                                                                          BTP 5-3 Position 1.1(3) (+20F)
                                -100                                                                                                    0.0
                                              -50  -25      0        25        50        75        100      125                        -100      -50        0          50          100          150            200 Longitudinal T50ft-lbs&35mills [°F]                                                      Transverse - Longitudinal T50ft-lbs&35mills [°F]
T50ft-lbs determines the value of T50ft-lbs&35mills
* 81% of the time for longitudinal specimens
* 92% of the time for transverse specimens Position is non-conservative about two-thirds of the time Raw Data


TCVE(50/35)
Position 1.1(3)
Position 1.1(4): estimates RTNDT Position 1.2:  estimates USE 0255075100125150      tanh Fit Data 0255075100125150-200-100 0100200300      tanh Fit DataTemperature  [ F] Impact Energy  [
Assessing(b): Alternative TC(TRANS) Estimates 250              Mean: T50T = 0.58xT50L + 44.7 Lower Bound: T50T = 0.58xT50L + 2.0 Plate & Forging 200        Outlier (excluded)
ft-lbs] 130F 25% 28% 43% 47% A508-2: Heat 527536
Mean Transverse T50 [°F]
150        Lower Bound 100 50 0
                                  -50
                            -100
                                        -50  -25          0        25        50        75        100       125 Longitudinal T50 [°F]
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                  EG&G Data


Quotation If transversely
-oriented Charpy V
-notch specimens were not tested, the temperature at which 68 J (50 ft-lbs) and 0.89 mm (35 mils) LE would have been obtained on transverse specimens may be estimated by one of the following criteria: -Test results from longitudinally
-oriented specimens reduced to 65% of their value to provide conservative estimates of values expected from transversely oriented specimens.
-Temperatures at which 68 J (50 ft-l bs) and 0.89 mm (35 mils) LE were obtained on longitudinally
-oriented specimens increased 11
°C (20 °F) to provide a conservative estimate of the temperature that would have been necessary to obtain the same values on transversely
-oriented specimens.
Position 1.1(3)
Position 1.1(3)
Tests Required Longitudinally oriented CVN specimens Clear Interpretation Note that this position applies only to conversion between longitudinal and transverse Charpy values.
Assessing(b): Alternative TC(TRANS) Estimates 250        Mean: T50&35T = 0.68xT50&35L + 35 Low Bound: T50&35T = 0.68xT50&35L - 17 Plate & Forging Transverse T50ft-lbs&35mills [°F]
There are two approximations. They may not produce the same results. They are as follows (a) E TRANS = 0.65xELONG, then calc TC(TRANS) MLETRANS = 0.65xMLELONG, then calc TC(TRANS-MLE)  (b) TC(TRANS) = TC(LONG) + 20 °F TC(TRANS-MLE = TC(LONG-MLE) + 20 °F   where  ELONG is CVN energy measured by a longitudinally oriented specimen ETRANS is the estimated CVN for a transversely oriented specimen TC(LONG) is the temperature at which the minimum of three longitudinal CVN tests exhibits >35 mils AND >50 ft
200 Mean Lower Bound 150 100 50 0
-lbs TC(TRANS) is the estimated temperature at which the minimum of three transverse CVN tests exhibits >35 mils AND >50 ft
                                                -50
-lbs 1.Per the BTP, reduce longitudinal measurements to 65% of the measured values 2.Fit Charpy curves
                                        -100
-Energy vs. temperature
                                                      -50  -25        0          25        50        75        100        125 Longitudinal T50ft-lb&35mills [°F]
-Lateral expansion vs.
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                                   Raw Data
temperature 3.Determine MAX(T50ft-lb, T 35mills)  4.Value from Step 3 estimates the transition temperature of transverse data Position 1.1(3)
Assessing(a): Trans
= 0.65Long Energy Temperature Longitudinal Transverse = 0.65xLongitudinal


0.00.10.20.30.40.50.60.70.80.91.0-100-50 050100150200PercentileTransverse T 50Estimate Error  [ F]Non-conservative predictons: 33% Plates, 43% Forgings, 36% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)
Position 1.1(4)
-100-50 050100150200-50-25 0255075100125Transverse T 50Estimate Error  [ F]Trans T 50est. from Longx0.65  [ F]Non-conservative predictons: 33% Plates, 43% Forgings, 36% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)Position 1.1(3)
Quotation                              Tests Required If limited Charpy V-notch tests          Limited longitudinally oriented CVN tests at a single temperature were performed at a single temperature to confirm that at        Interpretation least 41 J (30 ft-lbs) was obtained,     Define:     TTEST = the temperature at which limited that temperature may be used as                              longitudinally oriented CVN tests were an estimate of the RTNDT provided                            conducted CV = absorbed energy observed at TTEST that at least 61J (45 ft-lbs) was        IF          CV 45 ft-lbs then RTNDT = TTEST obtained if the specimens were          ELSE        RTNDT = TTEST + 20 °F longitudinally oriented. If the minimum value obtained was less      When assessed using data sets for than 61 J (45 ft-lbs), the RTNDT    which full Charpy energy curves are may be estimated as 11 °C (20 °F)    available, EG&G interpreted Position above the test temperature.         1.1(4) as having 2 possible meanings:
Assessing(a): Trans
                                              - RTNDT = T45(LONG), and
= 0.65Long Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 36% of the time  
                                              - RTNDT = T30(LONG) + 20 °F These might not produce the same result. Therefore, both were assessed.
-100-50 050100150200-50-25 0255075100125Trans. T50ft-lbs&35millsEstimate Error [ F]Trans. T50ft-lbs&35millsest. from Longx0.65  [ F]Non-conservative predictons: 19% Plates, 48% Forgings, 30% OverallPlateForgingBTP 5-3 Position 1.1(3) (0F)0.00.10.20.30.40.50.60.70.80.91.0-100-50 050100150200PercentileTransverse T50ft-lbs&35millsestimate error  [ F]Non-conservative predictons: 19% Plates, 48% Forgings, 30% OverallPlateForgingBTP 5-3 Position 1.1(3) (0F)Position 1.1(3)
Assessing(a): Trans
= 0.65Long Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 30% of the time T50ft-lbs determines the value of T50ft-lbs&35mills 81% of the time for longitudinal specimens 92% of the time for t ransverse  specimens


-100-50 050100150200250-50-25 0255075100125Transverse  T 50[ F]Trans. T 50from Longx0.65[ F]Mean: T50T= 0.72xT50(e)+ 12.5  Bound:  T50T= 0.72xT50(e)-27.5Plate & ForgingOutlier (excluded)MeanLower BoundPosition 1.1(3)
Position 1.1(4)
Assessing(b): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. 
Assessed for Forgings RTNDT = T30(LONG) + 20 °F                                                                                                  RTNDT = T45(LONG) 150                                SA-508-2 Forging. RTndt per BTP 5-3 1.1(4)                                       150                            SA-508-2 Forging. RTndt per BTP 5-3 1.1(4)
-100-50 050100150200250-50-25 0255075100125Transverse  T50ft-lbs&35mills
Estimated RTNDT = T30L+20 [°F]
[ F]Trans. T50ft-lb&35millsest. from Longx0.65  [ F]Mean: T50&35T= 0.66xT50&35(e)+ 13  Bound:  T50&35T= 0.66xT50&35(e)-34Plate & ForgingMeanLower BoundPosition 1.1(3)
Estimated RTNDT = T45L [°F]
Assessing(a): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.
100              Forging                                                                                            100 SA-508-2 50                                                                                                                  50                                                                                  Top &
Position 1.1(3)
0                                                                                                                   0 bottom panel of
Assessing(b): TC(TRANS) = TC(LONG) + 20 F Non-conservative Non-conservative Same data plotted two different ways
                                  -50                                                                                                                  -50
-100-50 0 50 100 150 200-50-25 0 25 50 75 100 125Transverse
                                -100                                                                                                                -100
-Longitudinal T 50[ F]Longitudinal T 50[ F]Non-conservative predictons: 70% Plates, 50% Forgings, 64% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileTransverse
                                -150 Non-Conservative
-Longitudinal T 50[ F]Non-conservative predictons: 70% Plates, 50% Forgings, 64% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)Position is non-conservative about two-thirds of the time 0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileTransverse
                                                                                                                                                      -150 Non-Conservative            each pair
-Longitudinal T50ft-lbs&35mills
                                          -150      -100                       -50 "Official" RTNDT per ASME NB-2331 [°F]
[ F]Non-conservative predictons: 63% Plates, 57% Forgings, 60% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)-100-50 0 50 100 150 200-50-25 0 25 50 75 100 125Trans. -Longl. T50ft-lbs&35mills
0         50     100                                             -150     -100                        -50 "Official" RTNDT per ASME NB-2331 [°F]
[ F]Longitudinal T50ft-lbs&35mills
0        50     100 are the 1.0 0.9 93% of data under-predicted. Max =-95F                                1.0 0.9 93% of data under-predicted. Max =-86F same data 0.8 0.7 0.8 0.7 plotted two different Percentile                                                                                                              Percentile 0.6                                                                                                                  0.6 Non-Conservative                                                                                                    Non-Conservative 0.5                                                                                                                 0.5 0.4 0.3 0.4 0.3 ways 0.2                                                                                                                  0.2 0.1                                                                                                                  0.1 0.0                                                                                                                  0.0
[ F]Non-conservative predictons: 63% Plates, 57% Forgings, 60% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)Position 1.1(3)
                                      -100       -50                     0           50         100   150     200                                        -100       -50                   0             50         100   150   200 Error in Estimated RTNDT [°F]                                                                                       Error in Estimated RTNDT [°F]
Assessing(b): TC(TRANS) = TC(LONG) + 20 F Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about two-thirds of the time T50ft-lbs determines the value of T50ft-lbs&35mills 81% of the time for longitudinal specimens 92% of the time for t ransverse  specimens
Position is non-conservative about 90% of the time                                                                                                                                                               EG&G Data


Position 1.1(3)
Assessing(b): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. -100-50 0 50 100 150 200 250-50-25 0 25 50 75 100 125Transverse  T 50[ F]Longitudinal T 50[ F]Mean: T50T= 0.58xT50L+ 44.7  Lower Bound:  T50T= 0.58xT50L+ 2.0Plate & ForgingOutlier (excluded)MeanLower Bound
-100-50 0 50 100 150 200 250-50-25 0 25 50 75 100 125Transverse  T50ft-lbs&35mills
[ F]Longitudinal T50ft-lb&35mills
[ F]Mean: T50&35T= 0.68xT50&35L+ 35  Low Bound:  T50&35T= 0.68xT50&35L-17Plate & ForgingMeanLower BoundPosition 1.1(3)
Assessing(b): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.
Tests Required Limited longitudinally oriented CVN tests at a single temperature Interpretation Define: TTEST = the temperature at which limited longitudinally oriented CVN tests were conducted  C V =  absorbed energy observed at TTEST  IF C V  45 ft-lbs then RT NDT = TTEST ELSE RT NDT = TTEST + 20 °F Quotation If limited Charpy V
-notch tests were performed at a single temperature to confirm that at least 41 J (30 ft-lbs) was obtained, that temperature may be used as an estimate of the RTNDT provided that at least 61J (45 ft-lbs) was obtained if the specimens were longitudinally oriented. If the minimum value obtained was less than 61 J (45 ft-lbs), the RTNDT may be estimated as 11
°C (20 °F) above the test temperature. When assessed using data sets for which full Charpy energy curves are available, EG&G interpreted Position 1.1(4) as having 2 possible meanings:
-RTNDT = T45(LONG), and -RTNDT = T30(LONG) + 20 F These might not produce the same result. Therefore, both were assessed.
Position 1.1(4)
Position 1.1(4)
Assessed for Plates RTNDT = T30(LONG) + 20 °F                                                                                                  RTNDT = T45(LONG) 150                                SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4)                                        150                            SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4)
Estimated RTNDT = T30L+20 [°F]
Estimated RTNDT = T45L [°F]
100              Plate                                                                                              100 SA-533B-1 50                                                                                                                  50                                                                                  Top &
0                                                                                                                    0 bottom
                                  -50                                                                                                                  -50 panel of
                                -100                                                                                                                -100
                                -150 Non-Conservative
                                                                                                                                                      -150 Non-Conservative            each pair
                                          -150      -100                        -50 "Official" RTNDT per ASME NB-2331 [°F]
0        50      100                                            -150    -100                        -50 "Official" RTNDT per ASME NB-2331 [°F]
0        50    100 are the 1.0 0.9 38% of data under-predicted. Max =-38F                                1.0 0.9 38% of data under-predicted. Max =-27F same data Non-Conservative                                                                                                    Non-Conservative 0.8 0.7 0.8 0.7 plotted 2 different Percentile                                                                                                              Percentile 0.6                                                                                                                  0.6 0.5                                                                                                                  0.5 0.4 0.3 0.4 0.3 ways 0.2                                                                                                                  0.2 0.1                                                                                                                  0.1 0.0                                                                                                                  0.0
                                      -100        -50                    0          50        100  150    200                                        -100      -50                  0            50        100  150    200 Error in Estimated RTNDT [°F]                                                                                      Error in Estimated RTNDT [°F]
Position is non-conservative about 40% of the time                                                                                                                                                              EG&G Data


Position 1.1(4)
Position 1.2 Quotation                                   Tests Required For the beltline region of reactor vessels, Longitudinally oriented CVN specimens tested on the upper shelf.
Assessed for Forgings Top & bottom panel of each pair are the same data plotted two different ways -150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 30L+20  [ F]"Official" RTNDTper ASME NB
the upper shelf toughness must account for the effects of neutron radiation.       Clear Interpretation Reactor vessel beltline materials must             USETRANS = 0.65 x USELONG have Charpy upper shelf energy, in the       where transverse direction for base material and along the weld for weld material               USELONG        is CVN energy measured by longitudinally oriented specimens on according to the ASME Code, of no less                             the upper shelf than 102 J (75 ft-lbs) initially and must         USETRANS        is the estimated CVN energy for maintain Charpy upper shelf energy                                 transversely oriented specimens on the upper shelf throughout the life of the vessel of no less than 68 J (50 ft-lbs).
-2331  [ F]SA-508-2 Forging. RTndt per BTP 5
If Charpy upper shelf energy values were not obtained, conservative estimates should be made using results of tests on specimens from the first surveillance capsule removed.
-3 1.1(4)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]93% of data under
-predicted. Max =
-95F-150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 45L[ F]"Official" RTNDTper ASME NB
-2331  [ F]SA-508-2 Forging. RTndt per BTP 5
-3 1.1(4)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]93% of data under
-predicted. Max =
-86F Non-Conservative Non-ConservativeNon-ConservativeNon-ConservativeForging SA-508-2 RTNDT = T30(LONG) + 20 F RTNDT = T45(LONG) Position is non-conservative about 90% of the time 0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]38% of data under
-predicted. Max =
-27F-150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 45L[ F]"Official" RTNDTper ASME NB
-2331  [ F]SA-533B-1 Plate. RTndt per BTP 5
-3 1.1(4)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]38% of data under
-predicted. Max =
-38F-150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 30L+20  [ F]"Official" RTNDTper ASME NB
-2331  [ F]SA-533B-1 Plate. RTndt per BTP 5
-3 1.1(4)Non-Conservative Non-ConservativeNon-ConservativeNon-ConservativePlate SA-533B-1Position 1.1(4)
Assessed for Plates Top & bottom panel of each pair are the same data plotted 2 different ways RTNDT = T30(LONG) + 20 F RTNDT = T45(LONG) Position is non-conservative about 40% of the time Quotation For the beltline region of reactor vessels, the upper shelf toughness must account for the effects of neutron radiation.
Reactor vessel beltline materials must have Charpy upper shelf energy, in the transverse direction for base material and along the weld for weld material according to the ASME Code, of no less than 102 J (75 ft-lbs) initially and must maintain Charpy upper shelf energy throughout the life of the vessel of no less than 68 J (50 ft-lbs). If Charpy upper shelf energy values were not obtained, conservative estimates should be made using results of tests on specimens from the first surveillance capsule removed.
If tests were only made on longitudinal specimens, the values should be reduced to 65% of the longitudinal values to estimate the transverse properties.
If tests were only made on longitudinal specimens, the values should be reduced to 65% of the longitudinal values to estimate the transverse properties.
Position 1.2 Tests Required Longitudinally oriented CVN specimens tested on the upper shelf. Clear Interpretation USETRANS = 0.65 x USELONG    where  USELONG is CVN energy measured by longitudinally oriented specimens on the upper shelf USETRANS is the estimated CVN energy for transversely oriented specimens on the upper shelf


0.00.10.20.30.40.50.60.70.80.91.00.00.20.40.60.81.01.21.4PercentileTransverse / Longitudinal USE RatioNon-conservative predictons: 20% Plates, 14% Forgings, 18% OverallPlateForgingBTP 5-3 Position 1.2 (0.65)0.00.20.40.60.81.01.21.4 0 50 100 150 200 250Transverse / Longitudinal USE RatioLongitudinal Upper Shelf Energy [ft
Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall                1.0              Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2                                                                                                          Plate 0.8 Forging 1.0                                                                                          0.7            BTP 5-3 Position 1.2 (0.65)
-lbs]Non-conservative predictons: 20% Plates, 14% Forgings, 18% OverallPlateForging BTP 5-3 Position 1.2 (0.65)Position 1.2 Assessing: USETRANS = 0.65 USELONG Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 18% of the time 0.00.10.20.30.40.50.60.70.80.91.00.00.20.40.60.81.01.21.4PercentileTransverse / Longitudinal USE RatioNon-conservative predictons: 13% Plates, 33% Forgings, 21% OverallPlateForgingBTP 5-3 Position 1.2 (0.65)0.00.20.40.60.81.01.21.4 0 50 100 150 200 250Transverse / Longitudinal USE RatioLongitudinal Upper Shelf Energy  [ft
Percentile 0.6 0.8 0.5 0.6                                                                                          0.4        Non-conservative 0.3 0.4 Plate                          Non-conservative                                  0.2 0.2        Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0                                                                                          0.0 0      50           100           150           200           250                        0.0      0.2        0.4        0.6    0.8      1.0        1.2      1.4 Longitudinal Upper Shelf Energy [ft-lbs]                                                           Transverse / Longitudinal USE Ratio Position is non-conservative about 18% of the time EG&G Data
-lbs]Non-conservative predictons: 13% Plates, 33% Forgings, 21% OverallPlateForging BTP 5-3 Position 1.2 (0.65)Position 1.2 Assessing: USETRANS = 0.65  USELONG Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 21% of the time Position 1.2 Assessing: Alternative USETRANS Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative. 0 50 100 150 200 250 0 50 100 150 200 250Transverse Upper Shelf Energy  [ft
 
-lb]Longitudinal Upper Shelf Energy  [ft
Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall                1.0              Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2                                                                                                          Plate 0.8 Forging 1.0                                                                                          0.7            BTP 5-3 Position 1.2 (0.65)
-lb]Mean: Tuse = 0.61xLuse + 21.2   Lower Bound: Tuse = 0.61xLuse  
Percentile 0.6 0.8 0.5 0.6                                                                                          0.4        Non-conservative 0.3 0.4 Plate                          Non-conservative                                   0.2 0.2        Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0                                                                                          0.0 0      50          100            150            200            250                        0.0      0.2        0.4        0.6    0.8      1.0        1.2       1.4 Longitudinal Upper Shelf Energy [ft-lbs]                                                            Transverse / Longitudinal USE Ratio Position is non-conservative about 21% of the time Raw Data
-22.1PlateForgingMeanLower Bound 0 50 100 150 200 250 0 50 100 150 200 250Transverse Upper Shelf Energy [ft
 
-lb]Longitudinal Upper Shelf Energy [ft
Position 1.2 Assessing: Alternative USETRANS Estimates 250       Mean: Tuse = 0.61xLuse + 21.2 Lower Bound: Tuse = 0.61xLuse - 22.1 Transverse Upper Shelf Energy [ft-lb]
-lb]Mean: Tuse = Luse
200 Plate Forging 150        Mean Lower Bound 100 50 0
-36  Lower Bound:  Tuse = Luse
0      50            100          150            200          250 Longitudinal Upper Shelf Energy [ft-lb]
-65PlateForgingMeanLower BoundPosition 1.2 Assessing: Alternative USETRANS  Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative.
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative.                                                                             EG&G Data
Summary on Part I - Technical Evaluation Positions 1.1(3) and 1.2
-Results of the two studies are similar
-Staff analysis confirms non
-conservatism Position 1.1(4)
-EG&G report demonstrates position is non
-conservative
-Awaiting NDTT data from Archives to complete staff assessment Position of BPT 5-3 Forging Non-Conservative Prediction Rate Plate Non-Conservative Prediction Rate EG&G Data Raw Data EG&G Data Raw Data 1.1(3) (a) TRANS = 0.65LONG 43% 48% 33% 19% (b) TC(TRANS) = TC(LONG) + 20  F 50% 57% 70% 63% 1.1(4) RTNDT = T45(LONG) 93% TBD 38% TBD RTNDT = T30(LONG) + 20  F 93% TBD 38% TBD 1.2 USETRANS = 0.65  USELONG 14% 33% 20% 13%
Part II: Assess Potentially Affected Plants - Position 1.1(3) Plant Identification Search RVID for plants using BTP 5
-3 to determine plate (forging) RTNDT(u):          20 operating plants Rank plates (forging) according to the difference between RTPTS at 32 EFPY and 270
°F: Eight plants have their limiting plates or forgings using BTP5
-3 with difference less than 100 °F.
Plant-specific evaluation results The majority of the plants did not specify which BTP 5
-3 B1.1 position was used in determining their RTNDT(u) values  Details of calculation of RTNDT(u) values are not available.
One plant has full transverse Charpy data and the staff confirmed that BTP 5-3 was not used , so it will be dropped from the list A few plants have full longitudinal Charpy data        - The staff's RTNDT(u) values using lower bound Charpy data            and linear interpolation between two temperatures are lower than the licensee's value by 10 °F  A few plants may have PTS concern because the RTPTS values are below 270 °F by less than 75
°F          - In one case, the longitudinal Charpy data for one plate are significantly higher than other plates, indicating potential mislabeling


-100-50 0 50 100 150 200-50-25 0 25 50 75 100 125Trans. -Longl. T50ft-lbs&35mills
Position 1.2 Assessing: Alternative USETRANS Estimates 250                Mean: Tuse = Luse - 36 Lower Bound: Tuse = Luse - 65 Transverse Upper Shelf Energy [ft-lb]
[ F]Longitudinal T50ft-lbs&35mills
200 Plate Forging 150      Mean Lower Bound 100 50 0
[ F]Non-conservative predictons: 63% Plates, 57% Forgings, 60% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)
0      50         100           150           200           250 Longitudinal Upper Shelf Energy [ft-lb]
Why do we use the Selecting criterion of 75
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative.                                                                           Raw Data
°F?   
- Identify raw data with the greatest conservatism and non
-conservatism Watts's Bar 1 - greatest non-conservatism Non-conservative Watt's Bar 1 Millstone 2 - greatest conservatism


Closer Look at the Charpy Data with the Greatest Non
Summary on Part I - Technical Evaluation
-Conservatism Longitudinal Data T50flb [oF] T35mill [oF] 31 - 0 25 50 75 100 125 150-200-100 0 100 200 300Impact Energy  [ft
* Positions 1.1(3) and 1.2
-lbs]Temperature [F]tanh FitData 0 25 50 75 100 125 150-200-100 0 100 200 300Impact Energy  [ft
        - Results of the two studies are similar
-lbs]Temperature  [F]tanh FitData T50flb [oF] T35mill [oF] 114.5 83.0 Transverse Data T50flb [oF] T35mill [oF] -15.5 -9.4 Longitudinal Data X .65
        - Staff analysis confirms non-conservatism
* Position 1.1(4)
        - EG&G report demonstrates position is non-conservative
        - Awaiting NDTT data from Archives to complete staff assessment Forging Non-Conservative Plate Non-Conservative Position of BPT 5-3                  Prediction Rate          Prediction Rate EG&G Data      Raw Data  EG&G Data      Raw Data (a) TRANS = 0.65xLONG              43%            48%      33%            19%
1.1(3)
(b) TC(TRANS) = TC(LONG) + 20 °F   50%            57%      70%            63%
RTNDT = T45(LONG)                  93%            TBD      38%            TBD 1.1(4)
RTNDT = T30(LONG) + 20 °F          93%            TBD      38%            TBD 1.2    USETRANS = 0.65 x USELONG          14%            33%      20%            13%


Determine the RTNDT for the Raw Data with the Greatest Non
Part II: Assess Potentially Affected Plants - Position 1.1(3)
-Conservatism Nil-ductility transition temperature (NDTT): -22 °F Official RTNDT(u) value: = 54.5 °F (114.5 °F - 60 °F) RTNDT(u) based on BTP 5-3B1.1(3)a: -22 °F      (At 31
Plant Identification
°F, the equivalent Charpy energy (.65  x longitudinal data) is 50 ft
* Search RVID for plants using BTP 5-3 to determine plate (forging) RTNDT(u):
-lb; RTNDT = NDTT)  RTNDT(u) based on BTP 5-3B1.1(3)b: -22 °F (At -15.5 °F, the Charpy energy is 50 ft-lb; since the adjusted temp is (-15.5 °F + 20 °F ), less than (-22°F +        60 °F), RTNDT = NDTT)
20 operating plants
Summary on the Study Focusing on the Raw Data with the Highest Non-Conservatism The highest non
* Rank plates (forging) according to the difference between RTPTS at 32 EFPY and 270 °F:
-conservative raw data is about 75 °F RTNDT determination is not sensitive to whether B1.1(3)a or B1.1(3)b is used for this case  RTNDT determination is affected by whether curve fitting of the entire Charpy data or hand calculations based on Charpy data at two temperatures are used
Eight plants have their limiting plates or forgings using BTP5-3 with difference less than 100 °F.


Part II: Assess Potentially Affected Plants - Position 1.2 Plant Identification
Plant-specific evaluation results
-45 operating plants identified in RVID as using Position 1.2  -RVID clearly identifies Position 1.2 as
* The majority of the plants did not specify which BTP 5-3 B1.1 position was used in determining their RTNDT(u) values
* Details of calculation of RTNDT(u) values are not available.
* One plant has full transverse Charpy data and the staff confirmed that BTP 5-3 was not used , so it will be dropped from the list
* A few plants have full longitudinal Charpy data
    - The staffs RTNDT(u) values using lower bound Charpy data and linear interpolation between two temperatures are lower than the licensees value by 10 °F
* A few plants may have PTS concern because the RTPTS values are below 270 °F by less than 75 °F
    - In one case, the longitudinal Charpy data for one plate are significantly higher than other plates, indicating potential mislabeling


UNIRR_USE_METHOD=65% -Spot-checking of RVID references to confirm accuracy still TBD  Non-conservatism
Why do we use the Selecting criterion of 75 °F?
-Data analysis shows the Position 1.2 estimate to be
- Identify raw data with the greatest conservatism and non-conservatism Wattss Bar 1 - greatest non-conservatism Millstone 2 - greatest conservatism 200          Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall Trans. - Longl. T50ft-lbs&35mills [°F]
150                              Watts Bar 1 100 Non-conservative 50 0
Plate
                                                                -50                                    Forging BTP 5-3 Position 1.1(3) (+20F)
                                                        -100
                                                                      -50  -25      0        25        50        75        100      125 Longitudinal T50ft-lbs&35mills [°F]


n on-conservative between 13% and 33% of the time
Closer Look at the Charpy Data with the Greatest Non-Conservatism 150                                                                                    150 125                                                                                    125 Impact Energy [ft-lbs]                                                                  Impact Energy [ft-lbs]
100                                                                                    100 75                                                                                    75 50                                                                                    50 tanh Fit 25                                                                                    25                                          tanh Fit Data                                                                                  Data 0                                                                                      0
                            -200  -100            0        100  200              300                              -200    -100    0      100        200              300 Temperature [F]                                                                      Temperature [F]
T50flb      T35mill                                                    T50flb  T35mill              T50flb    T35mill
[oF]        [oF]                                                      [oF]      [oF]                [oF]      [oF]
114.5        83.0                                                        31        -                -15.5      -9.4 Transverse Data                                      Longitudinal Data X .65                              Longitudinal Data


Next Steps NRC Complete technical analysis
Determine the RTNDT for the Raw Data with the Greatest Non-Conservatism
-Need NDTT data from Archives to complete assessment of Position 1.1(4)
* Nil-ductility transition temperature (NDTT): -22 °F
-Investigate GE RTNDT(u) procedure -Document findings Complete plant assessment
* Official RTNDT(u) value: = 54.5 °F (114.5 °F - 60 °F)
-Need to assess the impact to Pressure
* RTNDT(u) based on BTP 5-3B1.1(3)a: -22 °F (At 31 °F, the equivalent Charpy energy (.65 x longitudinal data) is 50 ft-lb; RTNDT = NDTT)
-temperature limits
* RTNDT(u) based on BTP 5-3B1.1(3)b: -22 °F (At -15.5 °F, the Charpy energy is 50 ft-lb; since the adjusted temp is (-15.5 °F + 20 °F ), less than (-22°F +
-Recommend to NRC management regarding use of interim conservatism in defining RTNDT(u) for the plants which may need to update their PTS evaluations Communicate findings to affected plants
60 °F), RTNDT = NDTT)
-Precise means TBD May need to revise BTP 5
-3 in Standard Review Plan Industry  Assess the impact of reported potential non
-conservatism including the need to redefine the RTNDT(u) on pressure
-temperature limits and PTS evaluations


BACKUP SLIDES
Summary on the Study Focusing on the Raw Data with the Highest Non-Conservatism
* The highest non-conservative raw data is about 75 °F
* RTNDT determination is not sensitive to whether B1.1(3)a or B1.1(3)b is used for this case
* RTNDT determination is affected by whether curve fitting of the entire Charpy data or hand calculations based on Charpy data at two temperatures are used


MethodNDTT  [ F]Meas. T 50  [ F]Trans. T 50  [ F]RTNDT  [ F]Non Conservatism
Part II: Assess Potentially Affected Plants - Position 1.2
[ F]NB-2331-22114.5114.554.5
* Plant Identification
---1.1(3)a: Energy*0.65-223131-2276.51.1(3)b: T50(LONG)+20  F-22-15.54.5-2276.5NB-2331-22109.5109.549.5
    - 45 operating plants identified in RVID as using Position 1.2
---1.1(3)a: Energy*0.65-224141-1968.51.1(3)b: T50(LONG)+20  F-22 0 20-2271.5  Charpy Fit Method:  tanh (mean)Charpy Fit Method:  Interpolate lower bound dataMain Points There is some effect of t anh fitting versus lower
    - RVID clearly identifies Position 1.2 as UNIRR_USE_METHOD=65%
-bound interpolation
    - Spot-checking of RVID references to confirm accuracy still TBD
-Interpolation can produce higher or lower transition temperature values than tanh fitting  Using either Charpy fitting method, BTP 5-3 Position 1.1(3) is non
* Non-conservatism
-conservative Comparison of Charpy Fit Methods 0.65  0 25 50 75 100    tanh FitData 0 25 50 75    tanh FitDataCharpy Energy  [ft
    - Data analysis shows the Position 1.2 estimate to be non-conservative between 13% and 33% of the time
-lbs] 0 25 50 75 100 125 150-200-100 0 100 200 300  Temperature  [F]tanh FitDatatanh fit interpolate lower bound data Assessment of BTP 5
-3 Protocols to Estimate RTNDT(u) and USE  Mark Kirk Simon Sheng Senior Materials Engineer  Senior Materials Engineer RES/DE/CIB NRR/DE/EVIB mark.kirk@nrc.gov simon.sheng@nrc.gov


NRC/EPRI Annual Materials Issue Program Information Exchange Meeting 4 th June 2014 Rockville, Maryland, USA
Next Steps NRC
* Complete technical analysis
    - Need NDTT data from Archives to complete assessment of Position 1.1(4)
    - Investigate GE RTNDT(u) procedure
    - Document findings
* Complete plant assessment
    - Need to assess the impact to Pressure-temperature limits
    - Recommend to NRC management regarding use of interim conservatism in defining RTNDT(u) for the plants which may need to update their PTS evaluations
* Communicate findings to affected plants
    - Precise means TBD
* May need to revise BTP 5-3 in Standard Review Plan Industry
* Assess the impact of reported potential non-conservatism including the need to redefine the RTNDT(u) on pressure-temperature limits and PTS evaluations


Outline of Presentation Un-Irradiated RTNDT (RTNDT(u)) & Un-Irradiated Upper Shelf Energy (USE) definitions & estimates Background of questions concerning BTP 5-3  Staff Assessment Part I - Technical evaluation of BTP 5-3 estimation of RTNDT(u) & USE  Staff Assessment Part I - Potentially Affected Plants Next steps
BACKUP SLIDES Comparison of                                                                                 75 Transverse Charpy Fit Methods                                                                            50 NDTT Meas. T50 Trans. T50 RTNDT Non Conservatism Method
[°F]      [°F]      [°F]    [°F]    [°F]                                  25 Charpy Fit Method: tanh (mean) tanh Fit NB-2331        -22    114.5    114.5      54.5          ---                                                                             Data 1.1(3)a:                                                                                    0
                  -22      31        31        -22          76.5                            100 Energy*0.65 Charpy Energy [ft-lbs]
1.1(3)b:                                                                                            Longitudinal x 0.65
                  -22    -15.5      4.5      -22          76.5 T50(LONG)+20 °F                                                                                75 Charpy Fit Method: Interpolate lower bound data NB-2331        -22    109.5    109.5      49.5          ---                              50 1.1(3)a:
                  -22      41        41        -19          68.5 Energy*0.65 25 1.1(3)b:                                                                                                                                  tanh Fit
                  -22      0        20        -22          71.5                                                                              Data T50(LONG)+20 °F 0
150 Main Points                                                                                              Longitudinal 125
* There is some effect of tanh fitting versus lower-bound interpolation                                                          100
          - Interpolation can produce higher or                                              75 lower transition temperature values                                              50 tanh fit interpolate than tanh fitting                                                                                                          lower tanh bound Fit 25                                      data Data
* Using either Charpy fitting method,                                                        0 BTP 5-3 Position 1.1(3) is non-                                                              -200        -100        0    100      200              300 conservative                                                                                                      Temperature [F]


TemperatureNDT is the lowest temperature of "no
United States Nuclear Regulatory Commission Official Hearing Exhibit In the Matter of:                    Entergy Nuclear Operations, Inc.
-break" performance No-Break: Fracture (darkened region) does not extend to the sides of the specimenBreak: Crack completely severs tension surface of specimen.
(Indian Point Nuclear Generating Units 2 and 3)
60,50/35TTMAXRTNDTNDT(u) Specimens notched transverse to RD Definitions: RTNDT(u) & USE per ASME NB
ASLBP #: 07-858-03-LR-BD01 Docket #: 05000247 l 05000286 Exhibit #: NYS000518-00-BD01                Identified: 11/5/2015                              NYS000518 Admitted: 11/5/2015                        Withdrawn:
-2331 per ASTM E185
Rejected:                                      Stricken:
-82 USE  average of all energies > 95% shear RTNDT(u) & USE Estimated by NUREG
Submitted: June 9, 2015 Other:
-0800 BTP 5-3 60,50/35TTMAXRTNDTNDT(u) per ASME NB
ML14163A524
-2331 per ASTM E185
Assessment of BTP 5-3 Protocols to Estimate RTNDT(u) and USE Mark Kirk                                    Simon Sheng Senior Materials Engineer                            Senior Materials Engineer RES/DE/CIB                                    NRR/DE/EVIB mark.kirk@nrc.gov                                simon.sheng@nrc.gov NRC/EPRI Annual Materials Issue Program Information Exchange Meeting 4th June 2014 Rockville, Maryland, USA
-82 USE   average of all energies > 95% shear Position 1.2 Positions 1.1(1) & 1.1(2)
Position 1.1(3)
Position 1.1(4)
Approximations


AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014
Outline of Presentation
-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings Literature search reveals 1983
* Un-Irradiated RTNDT (RTNDT(u)) & Un-Irradiated Upper Shelf Energy (USE) definitions & estimates
* Background of questions concerning BTP 5-3
* Staff Assessment Part I - Technical evaluation of BTP 5-3 estimation of RTNDT(u) & USE
* Staff Assessment Part I - Potentially Affected Plants
* Next steps


EG&G report & 1985 IJPVP paper -Evaluation of BTP 5
Definitions: RTNDT(u) & USE Specimens notched transverse to RD USE average of all energies > 95%
-3 (then    MTEB 5-2) for NRC
shear per ASTM E185-82 RT NDT(u)= MAX {T NDT , T35 / 50 60}
-Conclusions Always conservative
per ASME NB-2331 Break: Crack                      No-Break: Fracture completely severs                (darkened region) does tension surface of                not extend to the sides specimen.                         of the specimen Temperature NDT is the lowest temperature of no-break performance
-Position 1.1(1): estimates TNDT -Position 1.1(2): estimates TNDT Sometime non
-conservative
-Position 1.1(3): estimates TCVE(50/35)
-Position 1.1(4): estimates RTNDT -Position 1.2: estimates USE Background of Questions Concerning BTP 5-3 AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014
-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings Literature search reveals 1983


EG&G report & 1985 IJPVP paper -Evaluation of BTP 5
RTNDT(u) & USE Estimated by NUREG-0800 BTP 5-3 Approximations Position 1.1(4)
-3 (then    MTEB 5-2) for NRC
Positions 1.1(1) & 1.1(2)
-Conclusions Always conservative
Position 1.1(3)
-Position 1.1(1): estimates TNDT -Position 1.1(2): estimates TNDT  Sometime non
RT NDT(u)= MAX {T NDT , T35 / 50 60}
-conservative
per ASME NB-2331 Position 1.2 USE average of all energies > 95%
-Position 1.1(3): estimates TCVE(50/35)
shear per ASTM E185-82
-Position 1.1(4): estimates RTNDT -Position 1.2: estimates USE Background of Questions Concerning BTP 5-3 Part II: Assessment of  applicability to plants Query RVID
-RTNDT(u): establishes BTP 5-3 use, but not which position was used -USE: establishes BTP 5
-3 use  Search for documents


referenced by RVID in ADAMS legacy -Focus on plants closest to PTS
Background of Questions Concerning BTP 5-3
* AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
* Literature search reveals 1983 EG&G report & 1985 IJPVP paper
  - Evaluation of BTP 5-3 (then MTEB 5-2) for NRC
  - Conclusions
* Always conservative
        - Position 1.1(1): estimates TNDT
        - Position 1.1(2): estimates TNDT
* Sometime non-conservative
        - Position 1.1(3): estimates TCVE(50/35)
        - Position 1.1(4): estimates RTNDT
        - Position 1.2: estimates USE


(50.61) limit, these being most prone to influence by potential non-conservatisms
Background of Questions Concerning BTP 5-3
-References establish which
* AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
* Literature search reveals 1983 EG&G report & 1985 IJPVP paper
  - Evaluation of BTP 5-3 (then MTEB 5-2) for NRC
  - Conclusions
* Always conservative
        - Position 1.1(1): estimates TNDT
        - Position 1.1(2): estimates TNDT
* Sometime non-conservative
        - Position 1.1(3): estimates TCVE(50/35)
        - Position 1.1(4): estimates RTNDT
        - Position 1.2: estimates USE


position of BTP 5
NRC Staff Assessment Process Part I: Technical evaluation of BTP               Part II: Assessment of 5-3 estimation of RTNDT(u) and USE                 applicability to plants
-3 was used for RTNDT(u)  Part I: Technical evaluation of BTP 5-3 estimation of RTNDT(u) and USE D ata sources -Processed data (T50, USE, -) from 1983 EG&G report
* Data sources
-Raw data (CVE, MLE, temp) in  
* Query RVID
    - Processed data (T50, USE, ) from                - RTNDT(u): establishes BTP 5-3 1983 EG&G report                                   use, but not which position was
    - Raw data (CVE, MLE, temp) in                         used both specimen orientations from                - USE: establishes BTP 5-3 use surveillance reports (stored in REAP)
* Search for documents
    - Raw data (NDTT) from RVID refs.                referenced by RVID in ADAMS legacy
* Focus on                                            - Focus on plants closest to PTS
    - Plates & forgings only                              (50.61) limit, these being most
* No plants have used BTP 5-3 for                prone to influence by potential welds                                          non-conservatisms
    - Positions identified as sometimes                - References establish which non-conservative in 1983 by                        position of BTP 5-3 was used EG&G report                                        for RTNDT(u)
* Position 1.1(3): estimates TCVE(50/35)
* Position 1.1(4): estimates RTNDT
* Position 1.2: estimates USE


both specimen orientations from surveillance reports (stored in REAP) -Raw data (NDTT) from RVID refs.
Part I: Technical Evaluation Overview
Focus on -Plates & forgings only No plants have used BTP 5
* Data sources
-3 for welds -Positions identified as sometimes  
* While similar answers are expected from both sources
  - Processed data (T50, USE, )
* Given the potential impact of this evaluation, going from 1983 EG&G report                                                    back to the raw data was seen to be important.
  - Raw data (CVE, MLE, temp)                                      150 A508-2: Heat 527536 from surveillance reports                                                 Longitudinal 125 (stored in REAP)
  - Raw data (NDTT) from RVID                                       100 refs.                                                           75 Impact Energy [ft-lbs]
* Focus on                                                           50 tanh Fit
  - Plates & forgings only                                         25 Data
* No plants have used BTP 5-3                                   0 150 for welds Transverse
  - Positions identified as                                         125 sometimes non-conservative                                      100 by 1983 EG&G report                                                                              130°F                  47%
* Position 1.1(3): estimates                                  75 TCVE(50/35)                                                  50
* Position 1.1(4): estimates RTNDT                                                      28%
25%                                      tanh Fit
* Position 1.2: estimates USE                                  25 43%            Data 0
                                                                        -200          -100        0          100      200              300 Temperature [°F]


n on-conservative in 1983 by EG&G report Position 1.1(3): estimates TCVE(50/35)
Position 1.1(3)
Position 1.1(4): estimates RTNDT Position 1.2:  estimates USE NRC Staff Assessment Process
Quotation                                        Tests Required If transversely-oriented Charpy V-notch          Longitudinally oriented CVN specimens specimens were not tested, the temperature at which 68 J (50 ft-lbs) and        Clear Interpretation 0.89 mm (35 mils) LE would have been              Note that this position applies only to conversion between longitudinal obtained on transverse specimens may              and transverse Charpy values.
be estimated by one of the following              There are two approximations. They may not produce the same criteria:                                        results. They are as follows
      - Test results from longitudinally-oriented specimens reduced to 65% of their      (a)    ETRANS = 0.65xELONG, then calc TC(TRANS) value to provide conservative estimates         MLETRANS = 0.65xMLELONG, then calc TC(TRANS-MLE) of values expected from transversely oriented specimens.                    (b)    TC(TRANS) = TC(LONG) + 20 °F
      - Temperatures at which 68 J (50 ft-lbs)            TC(TRANS-MLE = TC(LONG-MLE) + 20 °F and 0.89 mm (35 mils) LE were obtained on longitudinally-oriented specimens    where increased 11 °C (20 °F) to provide a            ELONG          is CVN energy measured by a longitudinally conservative estimate of the                                    oriented specimen temperature that would have been                ETRANS          is the estimated CVN for a transversely oriented necessary to obtain the same values on                          specimen transversely-oriented specimens.               TC(LONG)        is the temperature at which the minimum of three longitudinal CVN tests exhibits >35 mils AND >50 ft-lbs TC(TRANS)      is the estimated temperature at which the minimum of three transverse CVN tests exhibits
                                                                          >35 mils AND >50 ft-lbs


Part I: Technical Evaluation Overview While similar answers are expected from both sources -  Given the potential impact of this evaluation,  going
Position 1.1(3)
Assessing(a): Trans = 0.65xLong
: 1. Per the BTP, reduce longitudinal measurements to                Longitudinal 65% of the measured values Energy
: 2. Fit Charpy curves
      - Energy vs. temperature                                      Transverse =
      - Lateral expansion vs.                                    0.65xLongitudinal temperature Temperature
: 3. Determine MAX(T50ft-lb, T35mills)
: 4. Value from Step 3 estimates the transition temperature of transverse data


back to the raw data was seen to be important.
Position 1.1(3)
Data sources
Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200          Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall                          Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall 1.0 Transverse T50 Estimate Error [°F]
-Processed data (T50, USE, -) from 1983 EG&G report
Plate                                                                              0.9 150 Forging                                                                            0.8 BTP 5-3 Position 1.1(3) (+20F)                                                     0.7 100 Percentile 0.6 50                                        Non-conservative                                    0.5 0.4 0
-Raw data (CVE, MLE, temp) from surveillance reports (stored in REAP)
0.3 Non-conservative 0.2                                      Plate
-Raw data (NDTT) from RVID
                                    -50 Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)
                            -100                                                                                                    0.0
                                          -50  -25        0        25        50        75        100        125                    -100  -50        0          50          100          150            200 Trans T50 est. from Longx0.65 [°F]                                                      Transverse T50 Estimate Error [°F]
Position is non-conservative about 36% of the time EG&G Data


refs. Focus on -Plates & forgings only No plants have used BTP 5
Position 1.1(3)
-3   for welds -Positions identified as
Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200            Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall                1.0          Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall Trans. T50ft-lbs&35mills Estimate Error [°F]
Plate                                                0.9 150                                        Forging                                              0.8 BTP 5-3 Position 1.1(3) (0F)                          0.7 100 Percentile 0.6 50                                          Non-conservative                                    0.5 0.4 0                                                                                              0.3 Non-conservative 0.2                                            Plate
                                              -50                                                                                                                                            Forging 0.1 BTP 5-3 Position 1.1(3) (0F)
                                    -100                                                                                                      0.0
                                                    -50    -25      0        25        50        75        100        125                    -100      -50        0          50          100          150            200 Trans. T50ft-lbs&35mills est. from Longx0.65 [°F]                                              Transverse T50ft-lbs&35mills estimate error [°F]
T50ft-lbs determines the value of T50ft-lbs&35mills
* 81% of the time for longitudinal specimens
* 92% of the time for transverse specimens Position is non-conservative about 30% of the time Raw Data


sometimes non
Position 1.1(3)
-conservative by 1983 EG&G report Position 1.1(3): estimates
Assessing(b): Alternative TC(TRANS) Estimates 250                    Mean: T50T = 0.72xT50(e) + 12.5 Bound: T50T = 0.72xT50(e)- 27.5 Plate & Forging 200        Outlier (excluded)
Mean Transverse T50 [°F]
150        Lower Bound 100 50 0
                                  -50
                              -100
                                        -50  -25        0          25          50        75        100        125 Trans. T50 from Longx0.65[°F]
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                    EG&G Data


TCVE(50/35)
Position 1.1(3)
Position 1.1(4): estimates RTNDT Position 1.2: estimates USE 0255075100125150      tanh Fit Data 0255075100125150-200-100 0100200300      tanh Fit DataTemperature  [ F] Impact Energy  [
Assessing(a): Alternative TC(TRANS) Estimates 250            Mean: T50&35T = 0.66xT50&35(e) + 13 Bound: T50&35T = 0.66xT50&35(e) - 34 Plate & Forging Transverse T50ft-lbs&35mills [°F]
ft-lbs] 130F 25% 28% 43% 47% A508-2: Heat 527536
200 Mean Lower Bound 150 100 50 0
                                                -50
                                        -100
                                                      -50    -25       0          25          50        75        100        125 Trans. T50ft-lb&35mills est. from Longx0.65 [°F]
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                                      Raw Data


Quotation If transversely
-oriented Charpy V
-notch specimens were not tested, the temperature at which 68 J (50 ft-lbs) and 0.89 mm (35 mils) LE would have been obtained on transverse specimens may be estimated by one of the following criteria: -Test results from longitudinally
-oriented specimens reduced to 65% of their value to provide conservative estimates of values expected from transversely oriented specimens.
-Temperatures at which 68 J (50 ft-l bs) and 0.89 mm (35 mils) LE were obtained on longitudinally
-oriented specimens increased 11
°C (20 °F) to provide a conservative estimate of the temperature that would have been necessary to obtain the same values on transversely
-oriented specimens.
Position 1.1(3)
Position 1.1(3)
Tests Required Longitudinally oriented CVN specimens Clear Interpretation Note that this position applies only to conversion between longitudinal and transverse Charpy values.
Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200          Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall                1.0          Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall Transverse - Longitudinal T50 [°F]
There are two approximations. They may not produce the same results. They are as follows (a) E TRANS = 0.65xELONG, then calc TC(TRANS) MLETRANS = 0.65xMLELONG, then calc TC(TRANS-MLE)  (b) TC(TRANS) = TC(LONG) + 20 °F TC(TRANS-MLE = TC(LONG-MLE) + 20 °F   where  ELONG is CVN energy measured by a longitudinally oriented specimen ETRANS is the estimated CVN for a transversely oriented specimen TC(LONG) is the temperature at which the minimum of three longitudinal CVN tests exhibits >35 mils AND >50 ft
0.9 150 0.8 0.7 100 Percentile 0.6 Non-conservative 50                                                                                           0.5 0.4 0
-lbs TC(TRANS) is the estimated temperature at which the minimum of three transverse CVN tests exhibits >35 mils AND >50 ft
0.3 Non-conservative Plate                                                  0.2                                         Plate
-lbs 1.Per the BTP, reduce longitudinal measurements to 65% of the measured values 2.Fit Charpy curves
                                    -50                                    Forging                                                                                            Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)                                                                      BTP 5-3 Position 1.1(3) (+20F)
-Energy vs. temperature
                            -100                                                                                                    0.0
-Lateral expansion vs.
                                          -50  -25      0        25        50        75        100        125                        -100  -50        0          50        100          150            200 Longitudinal T50 [°F]                                                              Transverse - Longitudinal T50 [°F]
temperature 3.Determine MAX(T50ft-lb, T 35mills)  4.Value from Step 3 estimates the transition temperature of transverse data Position 1.1(3)
Position is non-conservative about two-thirds of the time EG&G Data
Assessing(a): Trans
= 0.65Long Energy Temperature Longitudinal Transverse = 0.65xLongitudinal


0.00.10.20.30.40.50.60.70.80.91.0-100-50 050100150200PercentileTransverse T 50Estimate Error  [ F]Non-conservative predictons: 33% Plates, 43% Forgings, 36% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)
Position 1.1(3)
-100-50 050100150200-50-25 0255075100125Transverse T 50Estimate Error  [ F]Trans T 50est. from Longx0.65  [ F]Non-conservative predictons: 33% Plates, 43% Forgings, 36% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)Position 1.1(3)
Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200          Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall                1.0              Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall 0.9 Trans. - Longl. T50ft-lbs&35mills [°F]
Assessing(a): Trans
150                                                                                            0.8 0.7 100 Percentile 0.6 Non-conservative 50                                                                                            0.5 0.4 0                                                                                            0.3 Non-conservative Plate                                                  0.2                                              Plate
= 0.65Long Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 36% of the time 
                                        -50                                     Forging                                                                                                Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)                                                                         BTP 5-3 Position 1.1(3) (+20F)
-100-50 050100150200-50-25 0255075100125Trans. T50ft-lbs&35millsEstimate Error [ F]Trans. T50ft-lbs&35millsest. from Longx0.65  [ F]Non-conservative predictons: 19% Plates, 48% Forgings, 30% OverallPlateForgingBTP 5-3 Position 1.1(3) (0F)0.00.10.20.30.40.50.60.70.80.91.0-100-50 050100150200PercentileTransverse T50ft-lbs&35millsestimate error  [ F]Non-conservative predictons: 19% Plates, 48% Forgings, 30% OverallPlateForgingBTP 5-3 Position 1.1(3) (0F)Position 1.1(3)
                                -100                                                                                                    0.0
Assessing(a): Trans
                                              -50  -25      0        25        50        75        100      125                        -100      -50        0          50          100          150            200 Longitudinal T50ft-lbs&35mills [°F]                                                      Transverse - Longitudinal T50ft-lbs&35mills [°F]
= 0.65Long Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 30% of the time T50ft-lbs determines the value of T50ft-lbs&35mills 81% of the time for longitudinal specimens 92% of the time for t ransverse  specimens
T50ft-lbs determines the value of T50ft-lbs&35mills
* 81% of the time for longitudinal specimens
* 92% of the time for transverse specimens Position is non-conservative about two-thirds of the time Raw Data


-100-50 050100150200250-50-25 0255075100125Transverse  T 50[ F]Trans. T 50from Longx0.65[ F]Mean: T50T= 0.72xT50(e)+ 12.5  Bound:  T50T= 0.72xT50(e)-27.5Plate & ForgingOutlier (excluded)MeanLower BoundPosition 1.1(3)
Assessing(b): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. 
-100-50 050100150200250-50-25 0255075100125Transverse  T50ft-lbs&35mills
[ F]Trans. T50ft-lb&35millsest. from Longx0.65  [ F]Mean: T50&35T= 0.66xT50&35(e)+ 13  Bound:  T50&35T= 0.66xT50&35(e)-34Plate & ForgingMeanLower BoundPosition 1.1(3)
Assessing(a): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.
Position 1.1(3)
Position 1.1(3)
Assessing(b): TC(TRANS) = TC(LONG) + 20 F Non-conservative Non-conservative Same data plotted two different ways
Assessing(b): Alternative TC(TRANS) Estimates 250              Mean: T50T = 0.58xT50L + 44.7 Lower Bound: T50T = 0.58xT50L + 2.0 Plate & Forging 200        Outlier (excluded)
-100-50 0 50 100 150 200-50-25 0 25 50 75 100 125Transverse
Mean Transverse T50 [°F]
-Longitudinal T 50[ F]Longitudinal T 50[ F]Non-conservative predictons: 70% Plates, 50% Forgings, 64% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileTransverse
150        Lower Bound 100 50 0
-Longitudinal T 50[ F]Non-conservative predictons: 70% Plates, 50% Forgings, 64% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)Position is non-conservative about two-thirds of the time 0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileTransverse
                                  -50
-Longitudinal T50ft-lbs&35mills
                            -100
[ F]Non-conservative predictons: 63% Plates, 57% Forgings, 60% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)-100-50 0 50 100 150 200-50-25 0 25 50 75 100 125Trans. -Longl. T50ft-lbs&35mills
                                        -50   -25         0         25         50         75       100       125 Longitudinal T50 [°F]
[ F]Longitudinal T50ft-lbs&35mills
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                  EG&G Data
[ F]Non-conservative predictons: 63% Plates, 57% Forgings, 60% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)Position 1.1(3)
Assessing(b): TC(TRANS) = TC(LONG) + 20 F Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about two-thirds of the time T50ft-lbs determines the value of T50ft-lbs&35mills 81% of the time for longitudinal specimens 92% of the time for t ransverse  specimens


Position 1.1(3)
Position 1.1(3)
Assessing(b): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. -100-50 0 50 100 150 200 250-50-25 0 25 50 75 100 125Transverse  T 50[ F]Longitudinal T 50[ F]Mean: T50T= 0.58xT50L+ 44.7  Lower Bound: T50T= 0.58xT50L+ 2.0Plate & ForgingOutlier (excluded)MeanLower Bound  
Assessing(b): Alternative TC(TRANS) Estimates 250         Mean: T50&35T = 0.68xT50&35L + 35 Low Bound: T50&35T = 0.68xT50&35L - 17 Plate & Forging Transverse T50ft-lbs&35mills [°F]
-100-50 0 50 100 150 200 250-50-25 0 25 50 75 100 125Transverse  T50ft-lbs&35mills
200 Mean Lower Bound 150 100 50 0
[ F]Longitudinal T50ft-lb&35mills
                                                -50
[ F]Mean: T50&35T= 0.68xT50&35L+ 35  Low Bound:  T50&35T= 0.68xT50&35L-17Plate & ForgingMeanLower BoundPosition 1.1(3)
                                        -100
Assessing(b): Alternative TC(TRANS) Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.
                                                      -50   -25         0         25         50         75       100         125 Longitudinal T50ft-lb&35mills [°F]
Tests Required Limited longitudinally oriented CVN tests at a single temperature Interpretation Define: TTEST = the temperature at which limited longitudinally oriented CVN tests were conducted  C V =  absorbed energy observed at TTEST  IF C V  45 ft-lbs then RT NDT = TTEST ELSE RT NDT = TTEST + 20 °F Quotation If limited Charpy V
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative.                                                                                   Raw Data
-notch tests were performed at a single temperature to confirm that at least 41 J (30 ft-lbs) was obtained, that temperature may be used as an estimate of the RTNDT provided that at least 61J (45 ft-lbs) was obtained if the specimens were longitudinally oriented. If the minimum value obtained was less than 61 J (45 ft-lbs), the RTNDT may be estimated as 11  
 
°C (20 °F) above the test temperature. When assessed using data sets for which full Charpy energy curves are available, EG&G interpreted Position 1.1(4) as having 2 possible meanings:
Position 1.1(4)
-RTNDT = T45(LONG), and -RTNDT = T30(LONG) + 20 F These might not produce the same result. Therefore, both were assessed.
Quotation                              Tests Required If limited Charpy V-notch tests          Limited longitudinally oriented CVN tests at a single temperature were performed at a single temperature to confirm that at         Interpretation least 41 J (30 ft-lbs) was obtained,     Define:      TTEST = the temperature at which limited that temperature may be used as                               longitudinally oriented CVN tests were an estimate of the RTNDT provided                             conducted CV = absorbed energy observed at TTEST that at least 61J (45 ft-lbs) was       IF          CV  45 ft-lbs then RTNDT = TTEST obtained if the specimens were           ELSE        RTNDT = TTEST + 20 °F longitudinally oriented. If the minimum value obtained was less     When assessed using data sets for than 61 J (45 ft-lbs), the RTNDT     which full Charpy energy curves are may be estimated as 11 °C (20 °F)   available, EG&G interpreted Position above the test temperature.          1.1(4) as having 2 possible meanings:
                                              - RTNDT = T45(LONG), and
                                              - RTNDT = T30(LONG) + 20 °F These might not produce the same result. Therefore, both were assessed.
 
Position 1.1(4)
Position 1.1(4)
Assessed for Forgings RTNDT = T30(LONG) + 20 °F                                                                                                  RTNDT = T45(LONG) 150                                SA-508-2 Forging. RTndt per BTP 5-3 1.1(4)                                        150                            SA-508-2 Forging. RTndt per BTP 5-3 1.1(4)
Estimated RTNDT = T30L+20 [°F]
Estimated RTNDT = T45L [°F]
100              Forging                                                                                            100 SA-508-2 50                                                                                                                  50                                                                                  Top &
0                                                                                                                    0 bottom panel of
                                  -50                                                                                                                  -50
                                -100                                                                                                                -100
                                -150 Non-Conservative
                                                                                                                                                      -150 Non-Conservative            each pair
                                          -150      -100                        -50 "Official" RTNDT per ASME NB-2331 [°F]
0        50      100                                            -150    -100                        -50 "Official" RTNDT per ASME NB-2331 [°F]
0        50    100 are the 1.0 0.9 93% of data under-predicted. Max =-95F                                1.0 0.9 93% of data under-predicted. Max =-86F same data 0.8 0.7 0.8 0.7 plotted two different Percentile                                                                                                              Percentile 0.6                                                                                                                  0.6 Non-Conservative                                                                                                    Non-Conservative 0.5                                                                                                                  0.5 0.4 0.3 0.4 0.3 ways 0.2                                                                                                                  0.2 0.1                                                                                                                  0.1 0.0                                                                                                                  0.0
                                      -100        -50                    0          50        100  150    200                                        -100      -50                  0            50        100  150    200 Error in Estimated RTNDT [°F]                                                                                      Error in Estimated RTNDT [°F]
Position is non-conservative about 90% of the time                                                                                                                                                              EG&G Data


Position 1.1(4)
Position 1.1(4)
Assessed for Forgings Top & bottom panel of each pair are the same data plotted two different ways -150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 30L+20 [ F]"Official" RTNDTper ASME NB
Assessed for Plates RTNDT = T30(LONG) + 20 °F                                                                                                 RTNDT = T45(LONG) 150                                SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4)                                         150                            SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4)
-2331  [ F]SA-508-2 Forging. RTndt per BTP 5
Estimated RTNDT = T30L+20 [°F]
-3 1.1(4)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]93% of data under
Estimated RTNDT = T45L [°F]
-predicted. Max =
100              Plate                                                                                              100 SA-533B-1 50                                                                                                                  50                                                                                  Top &
-95F-150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 45L[ F]"Official" RTNDTper ASME NB
0                                                                                                                    0 bottom
-2331 [ F]SA-508-2 Forging. RTndt per BTP 5
                                  -50                                                                                                                  -50 panel of
-3 1.1(4)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]93% of data under
                                -100                                                                                                                 -100
-predicted. Max =
                                -150 Non-Conservative
-86F Non-Conservative Non-ConservativeNon-ConservativeNon-ConservativeForging SA-508-2 RTNDT = T30(LONG) + 20 F RTNDT = T45(LONG) Position is non-conservative about 90% of the time 0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]38% of data under
                                                                                                                                                      -150 Non-Conservative            each pair
-predicted. Max =
                                          -150     -100                       -50 "Official" RTNDT per ASME NB-2331 [°F]
-27F-150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 45L[ F]"Official" RTNDTper ASME NB
0         50     100                                            -150    -100                       -50 "Official" RTNDT per ASME NB-2331 [°F]
-2331  [ F]SA-533B-1 Plate. RTndt per BTP 5
0        50    100 are the 1.0 0.9 38% of data under-predicted. Max =-38F                                1.0 0.9 38% of data under-predicted. Max =-27F same data Non-Conservative                                                                                                    Non-Conservative 0.8 0.7 0.8 0.7 plotted 2 different Percentile                                                                                                              Percentile 0.6                                                                                                                  0.6 0.5                                                                                                                  0.5 0.4 0.3 0.4 0.3 ways 0.2                                                                                                                  0.2 0.1                                                                                                                  0.1 0.0                                                                                                                 0.0
-3 1.1(4)0.00.10.20.30.40.50.60.70.80.91.0-100-50 0 50 100 150 200PercentileError in Estimated RTNDT[ F]38% of data under
                                      -100       -50                     0           50         100   150     200                                        -100       -50                   0             50         100  150    200 Error in Estimated RTNDT [°F]                                                                                       Error in Estimated RTNDT [°F]
-predicted. Max =
Position is non-conservative about 40% of the time                                                                                                                                                               EG&G Data
-38F-150-100-50 0 50 100 150-150-100-50 0 50 100Estimated RTNDT= T 30L+20  [ F]"Official" RTNDTper ASME NB
 
-2331  [ F]SA-533B-1 Plate. RTndt per BTP 5
Position 1.2 Quotation                                   Tests Required For the beltline region of reactor vessels, Longitudinally oriented CVN specimens tested on the upper shelf.
-3 1.1(4)Non-Conservative Non-ConservativeNon-ConservativeNon-ConservativePlate SA-533B-1Position 1.1(4)
the upper shelf toughness must account for the effects of neutron radiation.       Clear Interpretation Reactor vessel beltline materials must             USETRANS = 0.65 x USELONG have Charpy upper shelf energy, in the       where transverse direction for base material and along the weld for weld material               USELONG        is CVN energy measured by longitudinally oriented specimens on according to the ASME Code, of no less                             the upper shelf than 102 J (75 ft-lbs) initially and must         USETRANS        is the estimated CVN energy for maintain Charpy upper shelf energy                                 transversely oriented specimens on the upper shelf throughout the life of the vessel of no less than 68 J (50 ft-lbs).
Assessed for Plates Top & bottom panel of each pair are the same data plotted 2 different ways RTNDT = T30(LONG) + 20 F RTNDT = T45(LONG) Position is non-conservative about 40% of the time Quotation For the beltline region of reactor vessels, the upper shelf toughness must account for the effects of neutron radiation.
If Charpy upper shelf energy values were not obtained, conservative estimates should be made using results of tests on specimens from the first surveillance capsule removed.
Reactor vessel beltline materials must have Charpy upper shelf energy, in the transverse direction for base material and along the weld for weld material according to the ASME Code, of no less than 102 J (75 ft-lbs) initially and must maintain Charpy upper shelf energy throughout the life of the vessel of no less than 68 J (50 ft-lbs). If Charpy upper shelf energy values were not obtained, conservative estimates should be made using results of tests on specimens from the first surveillance capsule removed.
If tests were only made on longitudinal specimens, the values should be reduced to 65% of the longitudinal values to estimate the transverse properties.
If tests were only made on longitudinal specimens, the values should be reduced to 65% of the longitudinal values to estimate the transverse properties.
Position 1.2 Tests Required Longitudinally oriented CVN specimens tested on the upper shelf. Clear Interpretation USETRANS = 0.65 x USELONG    where  USELONG is CVN energy measured by longitudinally oriented specimens on the upper shelf USETRANS is the estimated CVN energy for transversely oriented specimens on the upper shelf


0.00.10.20.30.40.50.60.70.80.91.00.00.20.40.60.81.01.21.4PercentileTransverse / Longitudinal USE RatioNon-conservative predictons: 20% Plates, 14% Forgings, 18% OverallPlateForgingBTP 5-3 Position 1.2 (0.65)0.00.20.40.60.81.01.21.4 0 50 100 150 200 250Transverse / Longitudinal USE RatioLongitudinal Upper Shelf Energy [ft
Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall                1.0              Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2                                                                                                          Plate 0.8 Forging 1.0                                                                                          0.7            BTP 5-3 Position 1.2 (0.65)
-lbs]Non-conservative predictons: 20% Plates, 14% Forgings, 18% OverallPlateForging BTP 5-3 Position 1.2 (0.65)Position 1.2 Assessing: USETRANS = 0.65 USELONG Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 18% of the time 0.00.10.20.30.40.50.60.70.80.91.00.00.20.40.60.81.01.21.4PercentileTransverse / Longitudinal USE RatioNon-conservative predictons: 13% Plates, 33% Forgings, 21% OverallPlateForgingBTP 5-3 Position 1.2 (0.65)0.00.20.40.60.81.01.21.4 0 50 100 150 200 250Transverse / Longitudinal USE RatioLongitudinal Upper Shelf Energy  [ft
Percentile 0.6 0.8 0.5 0.6                                                                                          0.4        Non-conservative 0.3 0.4 Plate                          Non-conservative                                  0.2 0.2        Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0                                                                                          0.0 0      50           100           150           200           250                        0.0      0.2        0.4        0.6    0.8      1.0        1.2      1.4 Longitudinal Upper Shelf Energy [ft-lbs]                                                           Transverse / Longitudinal USE Ratio Position is non-conservative about 18% of the time EG&G Data
-lbs]Non-conservative predictons: 13% Plates, 33% Forgings, 21% OverallPlateForging BTP 5-3 Position 1.2 (0.65)Position 1.2 Assessing: USETRANS = 0.65  USELONG Non-conservative Non-conservative Same data plotted two different ways Position is non-conservative about 21% of the time Position 1.2 Assessing: Alternative USETRANS Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative. 0 50 100 150 200 250 0 50 100 150 200 250Transverse Upper Shelf Energy [ft
 
-lb]Longitudinal Upper Shelf Energy  [ft
Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall                1.0              Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2                                                                                                          Plate 0.8 Forging 1.0                                                                                          0.7            BTP 5-3 Position 1.2 (0.65)
-lb]Mean: Tuse = 0.61xLuse + 21.2  Lower Bound:  Tuse = 0.61xLuse
Percentile 0.6 0.8 0.5 0.6                                                                                          0.4        Non-conservative 0.3 0.4 Plate                          Non-conservative                                   0.2 0.2        Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0                                                                                          0.0 0      50          100            150            200            250                        0.0      0.2        0.4        0.6    0.8      1.0        1.2       1.4 Longitudinal Upper Shelf Energy [ft-lbs]                                                            Transverse / Longitudinal USE Ratio Position is non-conservative about 21% of the time Raw Data
-22.1PlateForgingMeanLower Bound 0 50 100 150 200 250 0 50 100 150 200 250Transverse Upper Shelf Energy  [ft
 
-lb]Longitudinal Upper Shelf Energy [ft
Position 1.2 Assessing: Alternative USETRANS Estimates 250      Mean: Tuse = 0.61xLuse + 21.2 Lower Bound: Tuse = 0.61xLuse - 22.1 Transverse Upper Shelf Energy [ft-lb]
-lb]Mean: Tuse = Luse
200 Plate Forging 150        Mean Lower Bound 100 50 0
-36  Lower Bound:  Tuse = Luse
0      50            100          150            200          250 Longitudinal Upper Shelf Energy [ft-lb]
-65PlateForgingMeanLower BoundPosition 1.2 Assessing: Alternative USETRANS  Estimates Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative.
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative.                                                                             EG&G Data
Summary on Part I - Technical Evaluation Positions 1.1(3) and 1.2
 
-Results of the two studies are similar
Position 1.2 Assessing: Alternative USETRANS Estimates 250                 Mean: Tuse = Luse - 36 Lower Bound: Tuse = Luse - 65 Transverse Upper Shelf Energy [ft-lb]
-Staff analysis confirms non
200 Plate Forging 150      Mean Lower Bound 100 50 0
-conservatism Position 1.1(4)
0     50         100           150           200           250 Longitudinal Upper Shelf Energy [ft-lb]
-EG&G report demonstrates position is non
Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative.                                                                           Raw Data
-conservative
 
-Awaiting NDTT data from Archives to complete staff assessment Position of BPT 5-3 Forging Non-Conservative Prediction Rate Plate Non-Conservative Prediction Rate EG&G Data Raw Data EG&G Data Raw Data 1.1(3) (a) TRANS = 0.65LONG 43% 48% 33% 19% (b) TC(TRANS) = TC(LONG) + 20 F 50% 57% 70% 63% 1.1(4) RTNDT = T45(LONG) 93% TBD 38% TBD RTNDT = T30(LONG) + 20 F 93% TBD 38% TBD 1.2 USETRANS = 0.65 USELONG 14% 33% 20% 13%
Summary on Part I - Technical Evaluation
Part II: Assess Potentially Affected Plants - Position 1.1(3) Plant Identification Search RVID for plants using BTP 5
* Positions 1.1(3) and 1.2
-3 to determine plate (forging) RTNDT(u):          20 operating plants Rank plates (forging) according to the difference between RTPTS at 32 EFPY and 270
        - Results of the two studies are similar
°F: Eight plants have their limiting plates or forgings using BTP5
        - Staff analysis confirms non-conservatism
-3 with difference less than 100 °F.
* Position 1.1(4)
Plant-specific evaluation results The majority of the plants did not specify which BTP 5
        - EG&G report demonstrates position is non-conservative
-3 B1.1 position was used in determining their RTNDT(u) values  Details of calculation of RTNDT(u) values are not available.
        - Awaiting NDTT data from Archives to complete staff assessment Forging Non-Conservative  Plate Non-Conservative Position of BPT 5-3                   Prediction Rate         Prediction Rate EG&G Data     Raw Data EG&G Data       Raw Data (a) TRANS = 0.65xLONG              43%           48%       33%           19%
One plant has full transverse Charpy data and the staff confirmed that BTP 5-3 was not used , so it will be dropped from the list A few plants have full longitudinal Charpy data        - The staff's RTNDT(u) values using lower bound Charpy data            and linear interpolation between two temperatures are lower than the licensee's value by 10 °F  A few plants may have PTS concern because the RTPTS values are below 270 °F by less than 75
1.1(3)
°F          - In one case, the longitudinal Charpy data for one plate are significantly higher than other plates, indicating potential mislabeling
(b) TC(TRANS) = TC(LONG) + 20 °F   50%           57%       70%           63%
RTNDT = T45(LONG)                   93%           TBD       38%           TBD 1.1(4)
RTNDT = T30(LONG) + 20 °F           93%           TBD       38%           TBD 1.2   USETRANS = 0.65 x USELONG           14%           33%       20%           13%


-100-50 0 50 100 150 200-50-25 0 25 50 75 100 125Trans. -Longl. T50ft-lbs&35mills
Part II: Assess Potentially Affected Plants - Position 1.1(3)
[ F]Longitudinal T50ft-lbs&35mills
Plant Identification
[ F]Non-conservative predictons: 63% Plates, 57% Forgings, 60% OverallPlateForgingBTP 5-3 Position 1.1(3) (+20F)
* Search RVID for plants using BTP 5-3 to determine plate (forging) RTNDT(u):
Why do we use the Selecting criterion of 75
20 operating plants
°F?   
* Rank plates (forging) according to the difference between RTPTS at 32 EFPY and 270 °F:
- Identify raw data with the greatest conservatism and non
Eight plants have their limiting plates or forgings using BTP5-3 with difference less than 100 °F.
-conservatism Watts's Bar 1 - greatest non-conservatism Non-conservative Watt's Bar 1 Millstone 2 - greatest conservatism


Closer Look at the Charpy Data with the Greatest Non
Plant-specific evaluation results
-Conservatism Longitudinal Data T50flb [oF] T35mill [oF] 31 - 0 25 50 75 100 125 150-200-100 0 100 200 300Impact Energy  [ft
* The majority of the plants did not specify which BTP 5-3 B1.1 position was used in determining their RTNDT(u) values
-lbs]Temperature  [F]tanh FitData 0 25 50 75 100 125 150-200-100 0 100 200 300Impact Energy  [ft
* Details of calculation of RTNDT(u) values are not available.
-lbs]Temperature  [F]tanh FitData T50flb [oF] T35mill [oF] 114.5 83.0 Transverse Data T50flb [oF] T35mill [oF] -15.5 -9.4 Longitudinal Data X .65
* One plant has full transverse Charpy data and the staff confirmed that BTP 5-3 was not used , so it will be dropped from the list
* A few plants have full longitudinal Charpy data
    - The staffs RTNDT(u) values using lower bound Charpy data and linear interpolation between two temperatures are lower than the licensees value by 10 °F
* A few plants may have PTS concern because the RTPTS values are below 270 °F by less than 75 °F
    - In one case, the longitudinal Charpy data for one plate are significantly higher than other plates, indicating potential mislabeling


Determine the RTNDT for the Raw Data with the Greatest Non
Why do we use the Selecting criterion of 75 °F?
-Conservatism Nil-ductility transition temperature (NDTT): -22 °F Official RTNDT(u) value: = 54.5 °F (114.5 °F - 60 °F)  RTNDT(u) based on BTP 5-3B1.1(3)a: -22 °F      (At 31
- Identify raw data with the greatest conservatism and non-conservatism Wattss Bar 1 - greatest non-conservatism Millstone 2 - greatest conservatism 200          Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall Trans. - Longl. T50ft-lbs&35mills [°F]
°F, the equivalent Charpy energy (.65  x longitudinal data) is 50 ft
150                              Watts Bar 1 100 Non-conservative 50 0
-lb; RTNDT = NDTT)  RTNDT(u) based on BTP 5-3B1.1(3)b: -22 °F (At -15.5 °F, the Charpy energy is 50 ft-lb; since the adjusted temp is (-15.5 °F + 20 °F ), less than (-22°F +        60 °F), RTNDT = NDTT)
Plate
Summary on the Study Focusing on the Raw Data with the Highest Non-Conservatism The highest non
                                                                -50                                    Forging BTP 5-3 Position 1.1(3) (+20F)
-conservative raw data is about 75 °F RTNDT determination is not sensitive to whether B1.1(3)a or B1.1(3)b is used for this case  RTNDT determination is affected by whether curve fitting of the entire Charpy data or hand calculations based on Charpy data at two temperatures are used
                                                        -100
                                                                      -50  -25      0        25        50        75       100      125 Longitudinal T50ft-lbs&35mills [°F]


Part II: Assess Potentially Affected Plants - Position 1.2 Plant Identification
Closer Look at the Charpy Data with the Greatest Non-Conservatism 150                                                                                    150 125                                                                                    125 Impact Energy [ft-lbs]                                                                  Impact Energy [ft-lbs]
-45 operating plants identified in RVID as using Position 1.2  -RVID clearly identifies Position 1.2 as
100                                                                                    100 75                                                                                    75 50                                                                                    50 tanh Fit 25                                                                                    25                                          tanh Fit Data                                                                                  Data 0                                                                                      0
                            -200  -100            0        100  200              300                              -200    -100    0      100        200              300 Temperature [F]                                                                      Temperature [F]
T50flb      T35mill                                                    T50flb  T35mill              T50flb    T35mill
[oF]        [oF]                                                      [oF]      [oF]                [oF]      [oF]
114.5        83.0                                                        31        -                -15.5      -9.4 Transverse Data                                      Longitudinal Data X .65                              Longitudinal Data


UNIRR_USE_METHOD=65% -Spot-checking of RVID references to confirm accuracy still TBD  Non-conservatism
Determine the RTNDT for the Raw Data with the Greatest Non-Conservatism
-Data analysis shows the Position 1.2 estimate to be
* Nil-ductility transition temperature (NDTT): -22 °F
* Official RTNDT(u) value: = 54.5 °F (114.5 °F - 60 °F)
* RTNDT(u) based on BTP 5-3B1.1(3)a: -22 °F (At 31 °F, the equivalent Charpy energy (.65 x longitudinal data) is 50 ft-lb; RTNDT = NDTT)
* RTNDT(u) based on BTP 5-3B1.1(3)b: -22 °F (At -15.5 °F, the Charpy energy is 50 ft-lb; since the adjusted temp is (-15.5 °F + 20 °F ), less than (-22°F +
60 °F), RTNDT = NDTT)


n on-conservative between 13% and 33% of the time
Summary on the Study Focusing on the Raw Data with the Highest Non-Conservatism
* The highest non-conservative raw data is about 75 °F
* RTNDT determination is not sensitive to whether B1.1(3)a or B1.1(3)b is used for this case
* RTNDT determination is affected by whether curve fitting of the entire Charpy data or hand calculations based on Charpy data at two temperatures are used


Next Steps NRC Complete technical analysis
Part II: Assess Potentially Affected Plants - Position 1.2
-Need NDTT data from Archives to complete assessment of Position 1.1(4)
* Plant Identification
-Investigate GE RTNDT(u) procedure -Document findings Complete plant assessment
    - 45 operating plants identified in RVID as using Position 1.2
-Need to assess the impact to Pressure
    - RVID clearly identifies Position 1.2 as UNIRR_USE_METHOD=65%
-temperature limits
    - Spot-checking of RVID references to confirm accuracy still TBD
-Recommend to NRC management regarding use of interim conservatism in defining RTNDT(u) for the plants which may need to update their PTS evaluations Communicate findings to affected plants
* Non-conservatism
-Precise means TBD May need to revise BTP 5
    - Data analysis shows the Position 1.2 estimate to be non-conservative between 13% and 33% of the time
-3 in Standard Review Plan Industry  Assess the impact of reported potential non
-conservatism including the need to redefine the RTNDT(u) on pressure
-temperature limits and PTS evaluations


BACKUP SLIDES
Next Steps NRC
* Complete technical analysis
    - Need NDTT data from Archives to complete assessment of Position 1.1(4)
    - Investigate GE RTNDT(u) procedure
    - Document findings
* Complete plant assessment
    - Need to assess the impact to Pressure-temperature limits
    - Recommend to NRC management regarding use of interim conservatism in defining RTNDT(u) for the plants which may need to update their PTS evaluations
* Communicate findings to affected plants
    - Precise means TBD
* May need to revise BTP 5-3 in Standard Review Plan Industry
* Assess the impact of reported potential non-conservatism including the need to redefine the RTNDT(u) on pressure-temperature limits and PTS evaluations


MethodNDTT  [ F]Meas. T 50  [ F]Trans. T 50  [ F]RTNDT  [ F]Non Conservatism
BACKUP SLIDES Comparison of                                                                                  75 Transverse Charpy Fit Methods                                                                            50 NDTT Meas. T50 Trans. T50 RTNDT Non Conservatism Method
[ F]NB-2331-22114.5114.554.5
[°F]     [°F]       [°F]     [°F]   [°F]                                   25 Charpy Fit Method: tanh (mean) tanh Fit NB-2331         -22    114.5    114.5      54.5           ---                                                                             Data 1.1(3)a:                                                                                   0
---1.1(3)a: Energy*0.65-223131-2276.51.1(3)b: T50(LONG)+20  F-22-15.54.5-2276.5NB-2331-22109.5109.549.5
                  -22      31        31        -22          76.5                            100 Energy*0.65 Charpy Energy [ft-lbs]
---1.1(3)a: Energy*0.65-224141-1968.51.1(3)b: T50(LONG)+20  F-22 0 20-2271.5 Charpy Fit Method:  tanh (mean)Charpy Fit Method:  Interpolate lower bound dataMain Points There is some effect of t anh fitting versus lower
1.1(3)b:                                                                                           Longitudinal x 0.65
-bound interpolation
                  -22     -15.5      4.5       -22          76.5 T50(LONG)+20 °F                                                                                75 Charpy Fit Method: Interpolate lower bound data NB-2331         -22    109.5    109.5      49.5           ---                               50 1.1(3)a:
-Interpolation can produce higher or lower transition temperature values than tanh fitting Using either Charpy fitting method, BTP 5-3 Position 1.1(3) is non
                  -22      41        41        -19          68.5 Energy*0.65 25 1.1(3)b:                                                                                                                                   tanh Fit
-conservative Comparison of Charpy Fit Methods 0.65  0 25 50 75 100    tanh FitData 0 25 50 75    tanh FitDataCharpy Energy  [ft
                  -22     0         20       -22          71.5                                                                             Data T50(LONG)+20 °F 0
-lbs] 0 25 50 75 100 125 150-200-100 0 100 200 300   Temperature [F]tanh FitDatatanh fit interpolate lower bound data}}
150 Main Points                                                                                             Longitudinal 125
* There is some effect of tanh fitting versus lower-bound interpolation                                                           100
          - Interpolation can produce higher or                                               75 lower transition temperature values                                               50 tanh fit interpolate than tanh fitting                                                                                                         lower tanh bound Fit 25                                      data Data
* Using either Charpy fitting method,                                                         0 BTP 5-3 Position 1.1(3) is non-                                                             -200       -100         0   100       200             300 conservative                                                                                                      Temperature [F]}}

Latest revision as of 04:02, 31 October 2019

Official Exhibit - NYS000518-00-BD01 - Kirk, Mark and Sheng, Simon, USNRC, Assessment of BTP 5-3 Protocols to Estimate Rtndt(U) and Use, (June 4, 2014) (ML14163A524)
ML15331A202
Person / Time
Site: Indian Point  Entergy icon.png
Issue date: 06/04/2014
From:
State of NY, Office of the Attorney General
To:
Atomic Safety and Licensing Board Panel
SECY RAS
References
RAS 27910, ASLBP 07-858-03-LR-BD01, 50-247-LR, 50-286-LR
Download: ML15331A202 (37)
v • d • e


Text

United States Nuclear Regulatory Commission Official Hearing Exhibit In the Matter of: Entergy Nuclear Operations, Inc.

(Indian Point Nuclear Generating Units 2 and 3)

ASLBP #: 07-858-03-LR-BD01 Docket #: 05000247 l 05000286 Exhibit #: NYS000518-00-BD01 Identified: 11/5/2015 NYS000518 Admitted: 11/5/2015 Withdrawn:

Rejected: Stricken:

Submitted: June 9, 2015 Other:

ML14163A524

Assessment of BTP 5-3 Protocols to Estimate RTNDT(u) and USE Mark Kirk Simon Sheng Senior Materials Engineer Senior Materials Engineer RES/DE/CIB NRR/DE/EVIB mark.kirk@nrc.gov simon.sheng@nrc.gov NRC/EPRI Annual Materials Issue Program Information Exchange Meeting 4th June 2014 Rockville, Maryland, USA

Outline of Presentation

  • Un-Irradiated RTNDT (RTNDT(u)) & Un-Irradiated Upper Shelf Energy (USE) definitions & estimates
  • Background of questions concerning BTP 5-3
  • Staff Assessment Part I - Technical evaluation of BTP 5-3 estimation of RTNDT(u) & USE
  • Staff Assessment Part I - Potentially Affected Plants
  • Next steps

Definitions: RTNDT(u) & USE Specimens notched transverse to RD USE average of all energies > 95%

shear per ASTM E185-82 RT NDT(u)= MAX {T NDT , T35 / 50 60}

per ASME NB-2331 Break: Crack No-Break: Fracture completely severs (darkened region) does tension surface of not extend to the sides specimen. of the specimen Temperature NDT is the lowest temperature of no-break performance

RTNDT(u) & USE Estimated by NUREG-0800 BTP 5-3 Approximations Position 1.1(4)

Positions 1.1(1) & 1.1(2)

Position 1.1(3)

RT NDT(u)= MAX {T NDT , T35 / 50 60}

per ASME NB-2331 Position 1.2 USE average of all energies > 95%

shear per ASTM E185-82

Background of Questions Concerning BTP 5-3

  • AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
  • Literature search reveals 1983 EG&G report & 1985 IJPVP paper

- Evaluation of BTP 5-3 (then MTEB 5-2) for NRC

- Conclusions

  • Always conservative

- Position 1.1(1): estimates TNDT

- Position 1.1(2): estimates TNDT

  • Sometime non-conservative

- Position 1.1(3): estimates TCVE(50/35)

- Position 1.1(4): estimates RTNDT

- Position 1.2: estimates USE

Background of Questions Concerning BTP 5-3

  • AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
  • Literature search reveals 1983 EG&G report & 1985 IJPVP paper

- Evaluation of BTP 5-3 (then MTEB 5-2) for NRC

- Conclusions

  • Always conservative

- Position 1.1(1): estimates TNDT

- Position 1.1(2): estimates TNDT

  • Sometime non-conservative

- Position 1.1(3): estimates TCVE(50/35)

- Position 1.1(4): estimates RTNDT

- Position 1.2: estimates USE

NRC Staff Assessment Process Part I: Technical evaluation of BTP Part II: Assessment of 5-3 estimation of RTNDT(u) and USE applicability to plants

  • Data sources
  • Query RVID

- Processed data (T50, USE, ) from - RTNDT(u): establishes BTP 5-3 1983 EG&G report use, but not which position was

- Raw data (CVE, MLE, temp) in used both specimen orientations from - USE: establishes BTP 5-3 use surveillance reports (stored in REAP)

  • Search for documents

- Raw data (NDTT) from RVID refs. referenced by RVID in ADAMS legacy

  • Focus on - Focus on plants closest to PTS

- Plates & forgings only (50.61) limit, these being most

  • No plants have used BTP 5-3 for prone to influence by potential welds non-conservatisms

- Positions identified as sometimes - References establish which non-conservative in 1983 by position of BTP 5-3 was used EG&G report for RTNDT(u)

  • Position 1.1(3): estimates TCVE(50/35)
  • Position 1.1(4): estimates RTNDT
  • Position 1.2: estimates USE

Part I: Technical Evaluation Overview

  • Data sources
  • While similar answers are expected from both sources

- Processed data (T50, USE, )

  • Given the potential impact of this evaluation, going from 1983 EG&G report back to the raw data was seen to be important.

- Raw data (CVE, MLE, temp) 150 A508-2: Heat 527536 from surveillance reports Longitudinal 125 (stored in REAP)

- Raw data (NDTT) from RVID 100 refs. 75 Impact Energy [ft-lbs]

  • Focus on 50 tanh Fit

- Plates & forgings only 25 Data

  • No plants have used BTP 5-3 0 150 for welds Transverse

- Positions identified as 125 sometimes non-conservative 100 by 1983 EG&G report 130°F 47%

  • Position 1.1(3): estimates 75 TCVE(50/35) 50
  • Position 1.1(4): estimates RTNDT 28%

25% tanh Fit

  • Position 1.2: estimates USE 25 43% Data 0

-200 -100 0 100 200 300 Temperature [°F]

Position 1.1(3)

Quotation Tests Required If transversely-oriented Charpy V-notch Longitudinally oriented CVN specimens specimens were not tested, the temperature at which 68 J (50 ft-lbs) and Clear Interpretation 0.89 mm (35 mils) LE would have been Note that this position applies only to conversion between longitudinal obtained on transverse specimens may and transverse Charpy values.

be estimated by one of the following There are two approximations. They may not produce the same criteria: results. They are as follows

- Test results from longitudinally-oriented specimens reduced to 65% of their (a) ETRANS = 0.65xELONG, then calc TC(TRANS) value to provide conservative estimates MLETRANS = 0.65xMLELONG, then calc TC(TRANS-MLE) of values expected from transversely oriented specimens. (b) TC(TRANS) = TC(LONG) + 20 °F

- Temperatures at which 68 J (50 ft-lbs) TC(TRANS-MLE = TC(LONG-MLE) + 20 °F and 0.89 mm (35 mils) LE were obtained on longitudinally-oriented specimens where increased 11 °C (20 °F) to provide a ELONG is CVN energy measured by a longitudinally conservative estimate of the oriented specimen temperature that would have been ETRANS is the estimated CVN for a transversely oriented necessary to obtain the same values on specimen transversely-oriented specimens. TC(LONG) is the temperature at which the minimum of three longitudinal CVN tests exhibits >35 mils AND >50 ft-lbs TC(TRANS) is the estimated temperature at which the minimum of three transverse CVN tests exhibits

>35 mils AND >50 ft-lbs

Position 1.1(3)

Assessing(a): Trans = 0.65xLong

1. Per the BTP, reduce longitudinal measurements to Longitudinal 65% of the measured values Energy
2. Fit Charpy curves

- Energy vs. temperature Transverse =

- Lateral expansion vs. 0.65xLongitudinal temperature Temperature

3. Determine MAX(T50ft-lb, T35mills)
4. Value from Step 3 estimates the transition temperature of transverse data

Position 1.1(3)

Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200 Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall 1.0 Transverse T50 Estimate Error [°F]

Plate 0.9 150 Forging 0.8 BTP 5-3 Position 1.1(3) (+20F) 0.7 100 Percentile 0.6 50 Non-conservative 0.5 0.4 0

0.3 Non-conservative 0.2 Plate

-50 Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Trans T50 est. from Longx0.65 [°F] Transverse T50 Estimate Error [°F]

Position is non-conservative about 36% of the time EG&G Data

Position 1.1(3)

Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200 Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall 1.0 Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall Trans. T50ft-lbs&35mills Estimate Error [°F]

Plate 0.9 150 Forging 0.8 BTP 5-3 Position 1.1(3) (0F) 0.7 100 Percentile 0.6 50 Non-conservative 0.5 0.4 0 0.3 Non-conservative 0.2 Plate

-50 Forging 0.1 BTP 5-3 Position 1.1(3) (0F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Trans. T50ft-lbs&35mills est. from Longx0.65 [°F] Transverse T50ft-lbs&35mills estimate error [°F]

T50ft-lbs determines the value of T50ft-lbs&35mills

  • 81% of the time for longitudinal specimens
  • 92% of the time for transverse specimens Position is non-conservative about 30% of the time Raw Data

Position 1.1(3)

Assessing(b): Alternative TC(TRANS) Estimates 250 Mean: T50T = 0.72xT50(e) + 12.5 Bound: T50T = 0.72xT50(e)- 27.5 Plate & Forging 200 Outlier (excluded)

Mean Transverse T50 [°F]

150 Lower Bound 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Trans. T50 from Longx0.65[°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. EG&G Data

Position 1.1(3)

Assessing(a): Alternative TC(TRANS) Estimates 250 Mean: T50&35T = 0.66xT50&35(e) + 13 Bound: T50&35T = 0.66xT50&35(e) - 34 Plate & Forging Transverse T50ft-lbs&35mills [°F]

200 Mean Lower Bound 150 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Trans. T50ft-lb&35mills est. from Longx0.65 [°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. Raw Data

Position 1.1(3)

Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200 Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall 1.0 Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall Transverse - Longitudinal T50 [°F]

0.9 150 0.8 0.7 100 Percentile 0.6 Non-conservative 50 0.5 0.4 0

0.3 Non-conservative Plate 0.2 Plate

-50 Forging Forging 0.1 BTP 5-3 Position 1.1(3) (+20F) BTP 5-3 Position 1.1(3) (+20F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Longitudinal T50 [°F] Transverse - Longitudinal T50 [°F]

Position is non-conservative about two-thirds of the time EG&G Data

Position 1.1(3)

Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200 Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall 1.0 Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall 0.9 Trans. - Longl. T50ft-lbs&35mills [°F]

150 0.8 0.7 100 Percentile 0.6 Non-conservative 50 0.5 0.4 0 0.3 Non-conservative Plate 0.2 Plate

-50 Forging Forging 0.1 BTP 5-3 Position 1.1(3) (+20F) BTP 5-3 Position 1.1(3) (+20F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Longitudinal T50ft-lbs&35mills [°F] Transverse - Longitudinal T50ft-lbs&35mills [°F]

T50ft-lbs determines the value of T50ft-lbs&35mills

  • 81% of the time for longitudinal specimens
  • 92% of the time for transverse specimens Position is non-conservative about two-thirds of the time Raw Data

Position 1.1(3)

Assessing(b): Alternative TC(TRANS) Estimates 250 Mean: T50T = 0.58xT50L + 44.7 Lower Bound: T50T = 0.58xT50L + 2.0 Plate & Forging 200 Outlier (excluded)

Mean Transverse T50 [°F]

150 Lower Bound 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Longitudinal T50 [°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. EG&G Data

Position 1.1(3)

Assessing(b): Alternative TC(TRANS) Estimates 250 Mean: T50&35T = 0.68xT50&35L + 35 Low Bound: T50&35T = 0.68xT50&35L - 17 Plate & Forging Transverse T50ft-lbs&35mills [°F]

200 Mean Lower Bound 150 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Longitudinal T50ft-lb&35mills [°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. Raw Data

Position 1.1(4)

Quotation Tests Required If limited Charpy V-notch tests Limited longitudinally oriented CVN tests at a single temperature were performed at a single temperature to confirm that at Interpretation least 41 J (30 ft-lbs) was obtained, Define: TTEST = the temperature at which limited that temperature may be used as longitudinally oriented CVN tests were an estimate of the RTNDT provided conducted CV = absorbed energy observed at TTEST that at least 61J (45 ft-lbs) was IF CV 45 ft-lbs then RTNDT = TTEST obtained if the specimens were ELSE RTNDT = TTEST + 20 °F longitudinally oriented. If the minimum value obtained was less When assessed using data sets for than 61 J (45 ft-lbs), the RTNDT which full Charpy energy curves are may be estimated as 11 °C (20 °F) available, EG&G interpreted Position above the test temperature. 1.1(4) as having 2 possible meanings:

- RTNDT = T45(LONG), and

- RTNDT = T30(LONG) + 20 °F These might not produce the same result. Therefore, both were assessed.

Position 1.1(4)

Assessed for Forgings RTNDT = T30(LONG) + 20 °F RTNDT = T45(LONG) 150 SA-508-2 Forging. RTndt per BTP 5-3 1.1(4) 150 SA-508-2 Forging. RTndt per BTP 5-3 1.1(4)

Estimated RTNDT = T30L+20 [°F]

Estimated RTNDT = T45L [°F]

100 Forging 100 SA-508-2 50 50 Top &

0 0 bottom panel of

-50 -50

-100 -100

-150 Non-Conservative

-150 Non-Conservative each pair

-150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 -150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 are the 1.0 0.9 93% of data under-predicted. Max =-95F 1.0 0.9 93% of data under-predicted. Max =-86F same data 0.8 0.7 0.8 0.7 plotted two different Percentile Percentile 0.6 0.6 Non-Conservative Non-Conservative 0.5 0.5 0.4 0.3 0.4 0.3 ways 0.2 0.2 0.1 0.1 0.0 0.0

-100 -50 0 50 100 150 200 -100 -50 0 50 100 150 200 Error in Estimated RTNDT [°F] Error in Estimated RTNDT [°F]

Position is non-conservative about 90% of the time EG&G Data

Position 1.1(4)

Assessed for Plates RTNDT = T30(LONG) + 20 °F RTNDT = T45(LONG) 150 SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4) 150 SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4)

Estimated RTNDT = T30L+20 [°F]

Estimated RTNDT = T45L [°F]

100 Plate 100 SA-533B-1 50 50 Top &

0 0 bottom

-50 -50 panel of

-100 -100

-150 Non-Conservative

-150 Non-Conservative each pair

-150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 -150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 are the 1.0 0.9 38% of data under-predicted. Max =-38F 1.0 0.9 38% of data under-predicted. Max =-27F same data Non-Conservative Non-Conservative 0.8 0.7 0.8 0.7 plotted 2 different Percentile Percentile 0.6 0.6 0.5 0.5 0.4 0.3 0.4 0.3 ways 0.2 0.2 0.1 0.1 0.0 0.0

-100 -50 0 50 100 150 200 -100 -50 0 50 100 150 200 Error in Estimated RTNDT [°F] Error in Estimated RTNDT [°F]

Position is non-conservative about 40% of the time EG&G Data

Position 1.2 Quotation Tests Required For the beltline region of reactor vessels, Longitudinally oriented CVN specimens tested on the upper shelf.

the upper shelf toughness must account for the effects of neutron radiation. Clear Interpretation Reactor vessel beltline materials must USETRANS = 0.65 x USELONG have Charpy upper shelf energy, in the where transverse direction for base material and along the weld for weld material USELONG is CVN energy measured by longitudinally oriented specimens on according to the ASME Code, of no less the upper shelf than 102 J (75 ft-lbs) initially and must USETRANS is the estimated CVN energy for maintain Charpy upper shelf energy transversely oriented specimens on the upper shelf throughout the life of the vessel of no less than 68 J (50 ft-lbs).

If Charpy upper shelf energy values were not obtained, conservative estimates should be made using results of tests on specimens from the first surveillance capsule removed.

If tests were only made on longitudinal specimens, the values should be reduced to 65% of the longitudinal values to estimate the transverse properties.

Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall 1.0 Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2 Plate 0.8 Forging 1.0 0.7 BTP 5-3 Position 1.2 (0.65)

Percentile 0.6 0.8 0.5 0.6 0.4 Non-conservative 0.3 0.4 Plate Non-conservative 0.2 0.2 Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0 0.0 0 50 100 150 200 250 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Longitudinal Upper Shelf Energy [ft-lbs] Transverse / Longitudinal USE Ratio Position is non-conservative about 18% of the time EG&G Data

Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall 1.0 Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2 Plate 0.8 Forging 1.0 0.7 BTP 5-3 Position 1.2 (0.65)

Percentile 0.6 0.8 0.5 0.6 0.4 Non-conservative 0.3 0.4 Plate Non-conservative 0.2 0.2 Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0 0.0 0 50 100 150 200 250 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Longitudinal Upper Shelf Energy [ft-lbs] Transverse / Longitudinal USE Ratio Position is non-conservative about 21% of the time Raw Data

Position 1.2 Assessing: Alternative USETRANS Estimates 250 Mean: Tuse = 0.61xLuse + 21.2 Lower Bound: Tuse = 0.61xLuse - 22.1 Transverse Upper Shelf Energy [ft-lb]

200 Plate Forging 150 Mean Lower Bound 100 50 0

0 50 100 150 200 250 Longitudinal Upper Shelf Energy [ft-lb]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative. EG&G Data

Position 1.2 Assessing: Alternative USETRANS Estimates 250 Mean: Tuse = Luse - 36 Lower Bound: Tuse = Luse - 65 Transverse Upper Shelf Energy [ft-lb]

200 Plate Forging 150 Mean Lower Bound 100 50 0

0 50 100 150 200 250 Longitudinal Upper Shelf Energy [ft-lb]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative. Raw Data

Summary on Part I - Technical Evaluation

  • Positions 1.1(3) and 1.2

- Results of the two studies are similar

- Staff analysis confirms non-conservatism

  • Position 1.1(4)

- EG&G report demonstrates position is non-conservative

- Awaiting NDTT data from Archives to complete staff assessment Forging Non-Conservative Plate Non-Conservative Position of BPT 5-3 Prediction Rate Prediction Rate EG&G Data Raw Data EG&G Data Raw Data (a) TRANS = 0.65xLONG 43% 48% 33% 19%

1.1(3)

(b) TC(TRANS) = TC(LONG) + 20 °F 50% 57% 70% 63%

RTNDT = T45(LONG) 93% TBD 38% TBD 1.1(4)

RTNDT = T30(LONG) + 20 °F 93% TBD 38% TBD 1.2 USETRANS = 0.65 x USELONG 14% 33% 20% 13%

Part II: Assess Potentially Affected Plants - Position 1.1(3)

Plant Identification

  • Search RVID for plants using BTP 5-3 to determine plate (forging) RTNDT(u):

20 operating plants

  • Rank plates (forging) according to the difference between RTPTS at 32 EFPY and 270 °F:

Eight plants have their limiting plates or forgings using BTP5-3 with difference less than 100 °F.

Plant-specific evaluation results

  • The majority of the plants did not specify which BTP 5-3 B1.1 position was used in determining their RTNDT(u) values
  • Details of calculation of RTNDT(u) values are not available.
  • One plant has full transverse Charpy data and the staff confirmed that BTP 5-3 was not used , so it will be dropped from the list
  • A few plants have full longitudinal Charpy data

- The staffs RTNDT(u) values using lower bound Charpy data and linear interpolation between two temperatures are lower than the licensees value by 10 °F

  • A few plants may have PTS concern because the RTPTS values are below 270 °F by less than 75 °F

- In one case, the longitudinal Charpy data for one plate are significantly higher than other plates, indicating potential mislabeling

Why do we use the Selecting criterion of 75 °F?

- Identify raw data with the greatest conservatism and non-conservatism Wattss Bar 1 - greatest non-conservatism Millstone 2 - greatest conservatism 200 Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall Trans. - Longl. T50ft-lbs&35mills [°F]

150 Watts Bar 1 100 Non-conservative 50 0

Plate

-50 Forging BTP 5-3 Position 1.1(3) (+20F)

-100

-50 -25 0 25 50 75 100 125 Longitudinal T50ft-lbs&35mills [°F]

Closer Look at the Charpy Data with the Greatest Non-Conservatism 150 150 125 125 Impact Energy [ft-lbs] Impact Energy [ft-lbs]

100 100 75 75 50 50 tanh Fit 25 25 tanh Fit Data Data 0 0

-200 -100 0 100 200 300 -200 -100 0 100 200 300 Temperature [F] Temperature [F]

T50flb T35mill T50flb T35mill T50flb T35mill

[oF] [oF] [oF] [oF] [oF] [oF]

114.5 83.0 31 - -15.5 -9.4 Transverse Data Longitudinal Data X .65 Longitudinal Data

Determine the RTNDT for the Raw Data with the Greatest Non-Conservatism

  • Nil-ductility transition temperature (NDTT): -22 °F
  • Official RTNDT(u) value: = 54.5 °F (114.5 °F - 60 °F)
  • RTNDT(u) based on BTP 5-3B1.1(3)a: -22 °F (At 31 °F, the equivalent Charpy energy (.65 x longitudinal data) is 50 ft-lb; RTNDT = NDTT)
  • RTNDT(u) based on BTP 5-3B1.1(3)b: -22 °F (At -15.5 °F, the Charpy energy is 50 ft-lb; since the adjusted temp is (-15.5 °F + 20 °F ), less than (-22°F +

60 °F), RTNDT = NDTT)

Summary on the Study Focusing on the Raw Data with the Highest Non-Conservatism

  • The highest non-conservative raw data is about 75 °F
  • RTNDT determination is not sensitive to whether B1.1(3)a or B1.1(3)b is used for this case
  • RTNDT determination is affected by whether curve fitting of the entire Charpy data or hand calculations based on Charpy data at two temperatures are used

Part II: Assess Potentially Affected Plants - Position 1.2

  • Plant Identification

- 45 operating plants identified in RVID as using Position 1.2

- RVID clearly identifies Position 1.2 as UNIRR_USE_METHOD=65%

- Spot-checking of RVID references to confirm accuracy still TBD

  • Non-conservatism

- Data analysis shows the Position 1.2 estimate to be non-conservative between 13% and 33% of the time

Next Steps NRC

  • Complete technical analysis

- Need NDTT data from Archives to complete assessment of Position 1.1(4)

- Investigate GE RTNDT(u) procedure

- Document findings

  • Complete plant assessment

- Need to assess the impact to Pressure-temperature limits

- Recommend to NRC management regarding use of interim conservatism in defining RTNDT(u) for the plants which may need to update their PTS evaluations

  • Communicate findings to affected plants

- Precise means TBD

  • May need to revise BTP 5-3 in Standard Review Plan Industry
  • Assess the impact of reported potential non-conservatism including the need to redefine the RTNDT(u) on pressure-temperature limits and PTS evaluations

BACKUP SLIDES Comparison of 75 Transverse Charpy Fit Methods 50 NDTT Meas. T50 Trans. T50 RTNDT Non Conservatism Method

[°F] [°F] [°F] [°F] [°F] 25 Charpy Fit Method: tanh (mean) tanh Fit NB-2331 -22 114.5 114.5 54.5 --- Data 1.1(3)a: 0

-22 31 31 -22 76.5 100 Energy*0.65 Charpy Energy [ft-lbs]

1.1(3)b: Longitudinal x 0.65

-22 -15.5 4.5 -22 76.5 T50(LONG)+20 °F 75 Charpy Fit Method: Interpolate lower bound data NB-2331 -22 109.5 109.5 49.5 --- 50 1.1(3)a:

-22 41 41 -19 68.5 Energy*0.65 25 1.1(3)b: tanh Fit

-22 0 20 -22 71.5 Data T50(LONG)+20 °F 0

150 Main Points Longitudinal 125

  • There is some effect of tanh fitting versus lower-bound interpolation 100

- Interpolation can produce higher or 75 lower transition temperature values 50 tanh fit interpolate than tanh fitting lower tanh bound Fit 25 data Data

  • Using either Charpy fitting method, 0 BTP 5-3 Position 1.1(3) is non- -200 -100 0 100 200 300 conservative Temperature [F]

United States Nuclear Regulatory Commission Official Hearing Exhibit In the Matter of: Entergy Nuclear Operations, Inc.

(Indian Point Nuclear Generating Units 2 and 3)

ASLBP #: 07-858-03-LR-BD01 Docket #: 05000247 l 05000286 Exhibit #: NYS000518-00-BD01 Identified: 11/5/2015 NYS000518 Admitted: 11/5/2015 Withdrawn:

Rejected: Stricken:

Submitted: June 9, 2015 Other:

ML14163A524

Assessment of BTP 5-3 Protocols to Estimate RTNDT(u) and USE Mark Kirk Simon Sheng Senior Materials Engineer Senior Materials Engineer RES/DE/CIB NRR/DE/EVIB mark.kirk@nrc.gov simon.sheng@nrc.gov NRC/EPRI Annual Materials Issue Program Information Exchange Meeting 4th June 2014 Rockville, Maryland, USA

Outline of Presentation

  • Un-Irradiated RTNDT (RTNDT(u)) & Un-Irradiated Upper Shelf Energy (USE) definitions & estimates
  • Background of questions concerning BTP 5-3
  • Staff Assessment Part I - Technical evaluation of BTP 5-3 estimation of RTNDT(u) & USE
  • Staff Assessment Part I - Potentially Affected Plants
  • Next steps

Definitions: RTNDT(u) & USE Specimens notched transverse to RD USE average of all energies > 95%

shear per ASTM E185-82 RT NDT(u)= MAX {T NDT , T35 / 50 60}

per ASME NB-2331 Break: Crack No-Break: Fracture completely severs (darkened region) does tension surface of not extend to the sides specimen. of the specimen Temperature NDT is the lowest temperature of no-break performance

RTNDT(u) & USE Estimated by NUREG-0800 BTP 5-3 Approximations Position 1.1(4)

Positions 1.1(1) & 1.1(2)

Position 1.1(3)

RT NDT(u)= MAX {T NDT , T35 / 50 60}

per ASME NB-2331 Position 1.2 USE average of all energies > 95%

shear per ASTM E185-82

Background of Questions Concerning BTP 5-3

  • AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
  • Literature search reveals 1983 EG&G report & 1985 IJPVP paper

- Evaluation of BTP 5-3 (then MTEB 5-2) for NRC

- Conclusions

  • Always conservative

- Position 1.1(1): estimates TNDT

- Position 1.1(2): estimates TNDT

  • Sometime non-conservative

- Position 1.1(3): estimates TCVE(50/35)

- Position 1.1(4): estimates RTNDT

- Position 1.2: estimates USE

Background of Questions Concerning BTP 5-3

  • AREVA Letter (30 Jan 2014, AREVA Ref. NRC:14:004) & PVP Paper (PVP2014-28897) claim Position 1.1(4) of BTP 5.3 is sometimes non-conservative for A508-2 forgings
  • Literature search reveals 1983 EG&G report & 1985 IJPVP paper

- Evaluation of BTP 5-3 (then MTEB 5-2) for NRC

- Conclusions

  • Always conservative

- Position 1.1(1): estimates TNDT

- Position 1.1(2): estimates TNDT

  • Sometime non-conservative

- Position 1.1(3): estimates TCVE(50/35)

- Position 1.1(4): estimates RTNDT

- Position 1.2: estimates USE

NRC Staff Assessment Process Part I: Technical evaluation of BTP Part II: Assessment of 5-3 estimation of RTNDT(u) and USE applicability to plants

  • Data sources
  • Query RVID

- Processed data (T50, USE, ) from - RTNDT(u): establishes BTP 5-3 1983 EG&G report use, but not which position was

- Raw data (CVE, MLE, temp) in used both specimen orientations from - USE: establishes BTP 5-3 use surveillance reports (stored in REAP)

  • Search for documents

- Raw data (NDTT) from RVID refs. referenced by RVID in ADAMS legacy

  • Focus on - Focus on plants closest to PTS

- Plates & forgings only (50.61) limit, these being most

  • No plants have used BTP 5-3 for prone to influence by potential welds non-conservatisms

- Positions identified as sometimes - References establish which non-conservative in 1983 by position of BTP 5-3 was used EG&G report for RTNDT(u)

  • Position 1.1(3): estimates TCVE(50/35)
  • Position 1.1(4): estimates RTNDT
  • Position 1.2: estimates USE

Part I: Technical Evaluation Overview

  • Data sources
  • While similar answers are expected from both sources

- Processed data (T50, USE, )

  • Given the potential impact of this evaluation, going from 1983 EG&G report back to the raw data was seen to be important.

- Raw data (CVE, MLE, temp) 150 A508-2: Heat 527536 from surveillance reports Longitudinal 125 (stored in REAP)

- Raw data (NDTT) from RVID 100 refs. 75 Impact Energy [ft-lbs]

  • Focus on 50 tanh Fit

- Plates & forgings only 25 Data

  • No plants have used BTP 5-3 0 150 for welds Transverse

- Positions identified as 125 sometimes non-conservative 100 by 1983 EG&G report 130°F 47%

  • Position 1.1(3): estimates 75 TCVE(50/35) 50
  • Position 1.1(4): estimates RTNDT 28%

25% tanh Fit

  • Position 1.2: estimates USE 25 43% Data 0

-200 -100 0 100 200 300 Temperature [°F]

Position 1.1(3)

Quotation Tests Required If transversely-oriented Charpy V-notch Longitudinally oriented CVN specimens specimens were not tested, the temperature at which 68 J (50 ft-lbs) and Clear Interpretation 0.89 mm (35 mils) LE would have been Note that this position applies only to conversion between longitudinal obtained on transverse specimens may and transverse Charpy values.

be estimated by one of the following There are two approximations. They may not produce the same criteria: results. They are as follows

- Test results from longitudinally-oriented specimens reduced to 65% of their (a) ETRANS = 0.65xELONG, then calc TC(TRANS) value to provide conservative estimates MLETRANS = 0.65xMLELONG, then calc TC(TRANS-MLE) of values expected from transversely oriented specimens. (b) TC(TRANS) = TC(LONG) + 20 °F

- Temperatures at which 68 J (50 ft-lbs) TC(TRANS-MLE = TC(LONG-MLE) + 20 °F and 0.89 mm (35 mils) LE were obtained on longitudinally-oriented specimens where increased 11 °C (20 °F) to provide a ELONG is CVN energy measured by a longitudinally conservative estimate of the oriented specimen temperature that would have been ETRANS is the estimated CVN for a transversely oriented necessary to obtain the same values on specimen transversely-oriented specimens. TC(LONG) is the temperature at which the minimum of three longitudinal CVN tests exhibits >35 mils AND >50 ft-lbs TC(TRANS) is the estimated temperature at which the minimum of three transverse CVN tests exhibits

>35 mils AND >50 ft-lbs

Position 1.1(3)

Assessing(a): Trans = 0.65xLong

1. Per the BTP, reduce longitudinal measurements to Longitudinal 65% of the measured values Energy
2. Fit Charpy curves

- Energy vs. temperature Transverse =

- Lateral expansion vs. 0.65xLongitudinal temperature Temperature

3. Determine MAX(T50ft-lb, T35mills)
4. Value from Step 3 estimates the transition temperature of transverse data

Position 1.1(3)

Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200 Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall Non-conservative predictons: 33% Plates, 43% Forgings, 36% Overall 1.0 Transverse T50 Estimate Error [°F]

Plate 0.9 150 Forging 0.8 BTP 5-3 Position 1.1(3) (+20F) 0.7 100 Percentile 0.6 50 Non-conservative 0.5 0.4 0

0.3 Non-conservative 0.2 Plate

-50 Forging 0.1 BTP 5-3 Position 1.1(3) (+20F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Trans T50 est. from Longx0.65 [°F] Transverse T50 Estimate Error [°F]

Position is non-conservative about 36% of the time EG&G Data

Position 1.1(3)

Assessing(a): Trans = 0.65xLong Same data plotted two different ways 200 Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall 1.0 Non-conservative predictons: 19% Plates, 48% Forgings, 30% Overall Trans. T50ft-lbs&35mills Estimate Error [°F]

Plate 0.9 150 Forging 0.8 BTP 5-3 Position 1.1(3) (0F) 0.7 100 Percentile 0.6 50 Non-conservative 0.5 0.4 0 0.3 Non-conservative 0.2 Plate

-50 Forging 0.1 BTP 5-3 Position 1.1(3) (0F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Trans. T50ft-lbs&35mills est. from Longx0.65 [°F] Transverse T50ft-lbs&35mills estimate error [°F]

T50ft-lbs determines the value of T50ft-lbs&35mills

  • 81% of the time for longitudinal specimens
  • 92% of the time for transverse specimens Position is non-conservative about 30% of the time Raw Data

Position 1.1(3)

Assessing(b): Alternative TC(TRANS) Estimates 250 Mean: T50T = 0.72xT50(e) + 12.5 Bound: T50T = 0.72xT50(e)- 27.5 Plate & Forging 200 Outlier (excluded)

Mean Transverse T50 [°F]

150 Lower Bound 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Trans. T50 from Longx0.65[°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. EG&G Data

Position 1.1(3)

Assessing(a): Alternative TC(TRANS) Estimates 250 Mean: T50&35T = 0.66xT50&35(e) + 13 Bound: T50&35T = 0.66xT50&35(e) - 34 Plate & Forging Transverse T50ft-lbs&35mills [°F]

200 Mean Lower Bound 150 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Trans. T50ft-lb&35mills est. from Longx0.65 [°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. Raw Data

Position 1.1(3)

Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200 Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall 1.0 Non-conservative predictons: 70% Plates, 50% Forgings, 64% Overall Transverse - Longitudinal T50 [°F]

0.9 150 0.8 0.7 100 Percentile 0.6 Non-conservative 50 0.5 0.4 0

0.3 Non-conservative Plate 0.2 Plate

-50 Forging Forging 0.1 BTP 5-3 Position 1.1(3) (+20F) BTP 5-3 Position 1.1(3) (+20F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Longitudinal T50 [°F] Transverse - Longitudinal T50 [°F]

Position is non-conservative about two-thirds of the time EG&G Data

Position 1.1(3)

Assessing(b): TC(TRANS) = TC(LONG) + 20 °F Same data plotted two different ways 200 Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall 1.0 Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall 0.9 Trans. - Longl. T50ft-lbs&35mills [°F]

150 0.8 0.7 100 Percentile 0.6 Non-conservative 50 0.5 0.4 0 0.3 Non-conservative Plate 0.2 Plate

-50 Forging Forging 0.1 BTP 5-3 Position 1.1(3) (+20F) BTP 5-3 Position 1.1(3) (+20F)

-100 0.0

-50 -25 0 25 50 75 100 125 -100 -50 0 50 100 150 200 Longitudinal T50ft-lbs&35mills [°F] Transverse - Longitudinal T50ft-lbs&35mills [°F]

T50ft-lbs determines the value of T50ft-lbs&35mills

  • 81% of the time for longitudinal specimens
  • 92% of the time for transverse specimens Position is non-conservative about two-thirds of the time Raw Data

Position 1.1(3)

Assessing(b): Alternative TC(TRANS) Estimates 250 Mean: T50T = 0.58xT50L + 44.7 Lower Bound: T50T = 0.58xT50L + 2.0 Plate & Forging 200 Outlier (excluded)

Mean Transverse T50 [°F]

150 Lower Bound 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Longitudinal T50 [°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. EG&G Data

Position 1.1(3)

Assessing(b): Alternative TC(TRANS) Estimates 250 Mean: T50&35T = 0.68xT50&35L + 35 Low Bound: T50&35T = 0.68xT50&35L - 17 Plate & Forging Transverse T50ft-lbs&35mills [°F]

200 Mean Lower Bound 150 100 50 0

-50

-100

-50 -25 0 25 50 75 100 125 Longitudinal T50ft-lb&35mills [°F]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse T50 values in a manner that is always conservative. Raw Data

Position 1.1(4)

Quotation Tests Required If limited Charpy V-notch tests Limited longitudinally oriented CVN tests at a single temperature were performed at a single temperature to confirm that at Interpretation least 41 J (30 ft-lbs) was obtained, Define: TTEST = the temperature at which limited that temperature may be used as longitudinally oriented CVN tests were an estimate of the RTNDT provided conducted CV = absorbed energy observed at TTEST that at least 61J (45 ft-lbs) was IF CV 45 ft-lbs then RTNDT = TTEST obtained if the specimens were ELSE RTNDT = TTEST + 20 °F longitudinally oriented. If the minimum value obtained was less When assessed using data sets for than 61 J (45 ft-lbs), the RTNDT which full Charpy energy curves are may be estimated as 11 °C (20 °F) available, EG&G interpreted Position above the test temperature. 1.1(4) as having 2 possible meanings:

- RTNDT = T45(LONG), and

- RTNDT = T30(LONG) + 20 °F These might not produce the same result. Therefore, both were assessed.

Position 1.1(4)

Assessed for Forgings RTNDT = T30(LONG) + 20 °F RTNDT = T45(LONG) 150 SA-508-2 Forging. RTndt per BTP 5-3 1.1(4) 150 SA-508-2 Forging. RTndt per BTP 5-3 1.1(4)

Estimated RTNDT = T30L+20 [°F]

Estimated RTNDT = T45L [°F]

100 Forging 100 SA-508-2 50 50 Top &

0 0 bottom panel of

-50 -50

-100 -100

-150 Non-Conservative

-150 Non-Conservative each pair

-150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 -150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 are the 1.0 0.9 93% of data under-predicted. Max =-95F 1.0 0.9 93% of data under-predicted. Max =-86F same data 0.8 0.7 0.8 0.7 plotted two different Percentile Percentile 0.6 0.6 Non-Conservative Non-Conservative 0.5 0.5 0.4 0.3 0.4 0.3 ways 0.2 0.2 0.1 0.1 0.0 0.0

-100 -50 0 50 100 150 200 -100 -50 0 50 100 150 200 Error in Estimated RTNDT [°F] Error in Estimated RTNDT [°F]

Position is non-conservative about 90% of the time EG&G Data

Position 1.1(4)

Assessed for Plates RTNDT = T30(LONG) + 20 °F RTNDT = T45(LONG) 150 SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4) 150 SA-533B-1 Plate. RTndt per BTP 5-3 1.1(4)

Estimated RTNDT = T30L+20 [°F]

Estimated RTNDT = T45L [°F]

100 Plate 100 SA-533B-1 50 50 Top &

0 0 bottom

-50 -50 panel of

-100 -100

-150 Non-Conservative

-150 Non-Conservative each pair

-150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 -150 -100 -50 "Official" RTNDT per ASME NB-2331 [°F]

0 50 100 are the 1.0 0.9 38% of data under-predicted. Max =-38F 1.0 0.9 38% of data under-predicted. Max =-27F same data Non-Conservative Non-Conservative 0.8 0.7 0.8 0.7 plotted 2 different Percentile Percentile 0.6 0.6 0.5 0.5 0.4 0.3 0.4 0.3 ways 0.2 0.2 0.1 0.1 0.0 0.0

-100 -50 0 50 100 150 200 -100 -50 0 50 100 150 200 Error in Estimated RTNDT [°F] Error in Estimated RTNDT [°F]

Position is non-conservative about 40% of the time EG&G Data

Position 1.2 Quotation Tests Required For the beltline region of reactor vessels, Longitudinally oriented CVN specimens tested on the upper shelf.

the upper shelf toughness must account for the effects of neutron radiation. Clear Interpretation Reactor vessel beltline materials must USETRANS = 0.65 x USELONG have Charpy upper shelf energy, in the where transverse direction for base material and along the weld for weld material USELONG is CVN energy measured by longitudinally oriented specimens on according to the ASME Code, of no less the upper shelf than 102 J (75 ft-lbs) initially and must USETRANS is the estimated CVN energy for maintain Charpy upper shelf energy transversely oriented specimens on the upper shelf throughout the life of the vessel of no less than 68 J (50 ft-lbs).

If Charpy upper shelf energy values were not obtained, conservative estimates should be made using results of tests on specimens from the first surveillance capsule removed.

If tests were only made on longitudinal specimens, the values should be reduced to 65% of the longitudinal values to estimate the transverse properties.

Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall 1.0 Non-conservative predictons: 20% Plates, 14% Forgings, 18% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2 Plate 0.8 Forging 1.0 0.7 BTP 5-3 Position 1.2 (0.65)

Percentile 0.6 0.8 0.5 0.6 0.4 Non-conservative 0.3 0.4 Plate Non-conservative 0.2 0.2 Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0 0.0 0 50 100 150 200 250 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Longitudinal Upper Shelf Energy [ft-lbs] Transverse / Longitudinal USE Ratio Position is non-conservative about 18% of the time EG&G Data

Position 1.2 Assessing: USETRANS = 0.65 x USELONG Same data plotted two different ways Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall 1.0 Non-conservative predictons: 13% Plates, 33% Forgings, 21% Overall 1.4 Transverse / Longitudinal USE Ratio 0.9 1.2 Plate 0.8 Forging 1.0 0.7 BTP 5-3 Position 1.2 (0.65)

Percentile 0.6 0.8 0.5 0.6 0.4 Non-conservative 0.3 0.4 Plate Non-conservative 0.2 0.2 Forging 0.1 BTP 5-3 Position 1.2 (0.65) 0.0 0.0 0 50 100 150 200 250 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Longitudinal Upper Shelf Energy [ft-lbs] Transverse / Longitudinal USE Ratio Position is non-conservative about 21% of the time Raw Data

Position 1.2 Assessing: Alternative USETRANS Estimates 250 Mean: Tuse = 0.61xLuse + 21.2 Lower Bound: Tuse = 0.61xLuse - 22.1 Transverse Upper Shelf Energy [ft-lb]

200 Plate Forging 150 Mean Lower Bound 100 50 0

0 50 100 150 200 250 Longitudinal Upper Shelf Energy [ft-lb]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative. EG&G Data

Position 1.2 Assessing: Alternative USETRANS Estimates 250 Mean: Tuse = Luse - 36 Lower Bound: Tuse = Luse - 65 Transverse Upper Shelf Energy [ft-lb]

200 Plate Forging 150 Mean Lower Bound 100 50 0

0 50 100 150 200 250 Longitudinal Upper Shelf Energy [ft-lb]

Preliminary analysis suggests that alternative formulae could be developed to convert longitudinal to transverse USE values in a manner that is always conservative. Raw Data

Summary on Part I - Technical Evaluation

  • Positions 1.1(3) and 1.2

- Results of the two studies are similar

- Staff analysis confirms non-conservatism

  • Position 1.1(4)

- EG&G report demonstrates position is non-conservative

- Awaiting NDTT data from Archives to complete staff assessment Forging Non-Conservative Plate Non-Conservative Position of BPT 5-3 Prediction Rate Prediction Rate EG&G Data Raw Data EG&G Data Raw Data (a) TRANS = 0.65xLONG 43% 48% 33% 19%

1.1(3)

(b) TC(TRANS) = TC(LONG) + 20 °F 50% 57% 70% 63%

RTNDT = T45(LONG) 93% TBD 38% TBD 1.1(4)

RTNDT = T30(LONG) + 20 °F 93% TBD 38% TBD 1.2 USETRANS = 0.65 x USELONG 14% 33% 20% 13%

Part II: Assess Potentially Affected Plants - Position 1.1(3)

Plant Identification

  • Search RVID for plants using BTP 5-3 to determine plate (forging) RTNDT(u):

20 operating plants

  • Rank plates (forging) according to the difference between RTPTS at 32 EFPY and 270 °F:

Eight plants have their limiting plates or forgings using BTP5-3 with difference less than 100 °F.

Plant-specific evaluation results

  • The majority of the plants did not specify which BTP 5-3 B1.1 position was used in determining their RTNDT(u) values
  • Details of calculation of RTNDT(u) values are not available.
  • One plant has full transverse Charpy data and the staff confirmed that BTP 5-3 was not used , so it will be dropped from the list
  • A few plants have full longitudinal Charpy data

- The staffs RTNDT(u) values using lower bound Charpy data and linear interpolation between two temperatures are lower than the licensees value by 10 °F

  • A few plants may have PTS concern because the RTPTS values are below 270 °F by less than 75 °F

- In one case, the longitudinal Charpy data for one plate are significantly higher than other plates, indicating potential mislabeling

Why do we use the Selecting criterion of 75 °F?

- Identify raw data with the greatest conservatism and non-conservatism Wattss Bar 1 - greatest non-conservatism Millstone 2 - greatest conservatism 200 Non-conservative predictons: 63% Plates, 57% Forgings, 60% Overall Trans. - Longl. T50ft-lbs&35mills [°F]

150 Watts Bar 1 100 Non-conservative 50 0

Plate

-50 Forging BTP 5-3 Position 1.1(3) (+20F)

-100

-50 -25 0 25 50 75 100 125 Longitudinal T50ft-lbs&35mills [°F]

Closer Look at the Charpy Data with the Greatest Non-Conservatism 150 150 125 125 Impact Energy [ft-lbs] Impact Energy [ft-lbs]

100 100 75 75 50 50 tanh Fit 25 25 tanh Fit Data Data 0 0

-200 -100 0 100 200 300 -200 -100 0 100 200 300 Temperature [F] Temperature [F]

T50flb T35mill T50flb T35mill T50flb T35mill

[oF] [oF] [oF] [oF] [oF] [oF]

114.5 83.0 31 - -15.5 -9.4 Transverse Data Longitudinal Data X .65 Longitudinal Data

Determine the RTNDT for the Raw Data with the Greatest Non-Conservatism

  • Nil-ductility transition temperature (NDTT): -22 °F
  • Official RTNDT(u) value: = 54.5 °F (114.5 °F - 60 °F)
  • RTNDT(u) based on BTP 5-3B1.1(3)a: -22 °F (At 31 °F, the equivalent Charpy energy (.65 x longitudinal data) is 50 ft-lb; RTNDT = NDTT)
  • RTNDT(u) based on BTP 5-3B1.1(3)b: -22 °F (At -15.5 °F, the Charpy energy is 50 ft-lb; since the adjusted temp is (-15.5 °F + 20 °F ), less than (-22°F +

60 °F), RTNDT = NDTT)

Summary on the Study Focusing on the Raw Data with the Highest Non-Conservatism

  • The highest non-conservative raw data is about 75 °F
  • RTNDT determination is not sensitive to whether B1.1(3)a or B1.1(3)b is used for this case
  • RTNDT determination is affected by whether curve fitting of the entire Charpy data or hand calculations based on Charpy data at two temperatures are used

Part II: Assess Potentially Affected Plants - Position 1.2

  • Plant Identification

- 45 operating plants identified in RVID as using Position 1.2

- RVID clearly identifies Position 1.2 as UNIRR_USE_METHOD=65%

- Spot-checking of RVID references to confirm accuracy still TBD

  • Non-conservatism

- Data analysis shows the Position 1.2 estimate to be non-conservative between 13% and 33% of the time

Next Steps NRC

  • Complete technical analysis

- Need NDTT data from Archives to complete assessment of Position 1.1(4)

- Investigate GE RTNDT(u) procedure

- Document findings

  • Complete plant assessment

- Need to assess the impact to Pressure-temperature limits

- Recommend to NRC management regarding use of interim conservatism in defining RTNDT(u) for the plants which may need to update their PTS evaluations

  • Communicate findings to affected plants

- Precise means TBD

  • May need to revise BTP 5-3 in Standard Review Plan Industry
  • Assess the impact of reported potential non-conservatism including the need to redefine the RTNDT(u) on pressure-temperature limits and PTS evaluations

BACKUP SLIDES Comparison of 75 Transverse Charpy Fit Methods 50 NDTT Meas. T50 Trans. T50 RTNDT Non Conservatism Method

[°F] [°F] [°F] [°F] [°F] 25 Charpy Fit Method: tanh (mean) tanh Fit NB-2331 -22 114.5 114.5 54.5 --- Data 1.1(3)a: 0

-22 31 31 -22 76.5 100 Energy*0.65 Charpy Energy [ft-lbs]

1.1(3)b: Longitudinal x 0.65

-22 -15.5 4.5 -22 76.5 T50(LONG)+20 °F 75 Charpy Fit Method: Interpolate lower bound data NB-2331 -22 109.5 109.5 49.5 --- 50 1.1(3)a:

-22 41 41 -19 68.5 Energy*0.65 25 1.1(3)b: tanh Fit

-22 0 20 -22 71.5 Data T50(LONG)+20 °F 0

150 Main Points Longitudinal 125

  • There is some effect of tanh fitting versus lower-bound interpolation 100

- Interpolation can produce higher or 75 lower transition temperature values 50 tanh fit interpolate than tanh fitting lower tanh bound Fit 25 data Data

  • Using either Charpy fitting method, 0 BTP 5-3 Position 1.1(3) is non- -200 -100 0 100 200 300 conservative Temperature [F]
Retrieved from "https://kanterella.com/w/index.php?title=ML15331A202&oldid=2026599"