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| number = ML17059B562
| number = ML17059B562
| issue date = 05/16/1997
| issue date = 05/16/1997
| title = Rev 1 to Ssflaw Overlay Size.
| title = Rev 1 to Ssflaw Overlay Size
| author name = Trench R
| author name = Trench R
| author affiliation = MPR ASSOCIATES, INC.
| author affiliation = MPR ASSOCIATES, INC.
Line 17: Line 17:


=Text=
=Text=
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ILIMPR                                                            320 King Street Alexandria, VA 22314 CALCULATIONTITLE PAGE Client Niagara Mohawk Power Corporation                                 Page1of8
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NMP-1 RWCU Weld 33-FW-22 Overlay Design 085-9708-295-0 Title                                                                                    Calculation No.
320 King Street Alexandria, VA 22314 CALCULATIONTITLE PAGE Client Project Title Niagara Mohawk Power Corporation NMP-1 RWCU Weld 33-FW-22 Overlay Design SSFLAW Overlay Size Page1of8
SSFLAW Overlay Size 085-295-02 Preparer/Date               Checker/Date               Reviewer/Date               Rev. No.
+ r4~u~avm Task No.
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085-9708-295-0 Calculation No.
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085-295-02 Preparer/Date Checker/Date Reviewer/Date Rev. No.
                                                                  ~(r.(q7 QUALITYASSURANCE DOCUMENT his document has been prepared, checked, and reviewed in accordance with the Quality Assurance requirements of 10CFR50 Appendix B, as specified in the MPR Quality Assurance Manual.
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9705280089 970519 PDR       ADQCK 05000220 P                     PDR
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~(r.(q7 QUALITYASSURANCE DOCUMENT his document has been prepared, checked, and reviewed in accordance with the Quality Assurance requirements of 10CFR50 Appendix B, as specified in the MPR Quality Assurance Manual.
9705280089 970519 PDR ADQCK 05000220 P
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lilMPR                                                        320 Nng Street Alexandria, VA 22314 RECORD OF REVISIONS Calcuiation No.
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085-2952 Revision c i~
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Prepared By Description Checked By Page 2 Initial Issue Changed title of Attachment 1.
RECORD OF REVISIONS Calcuiation No.
085-2952 Revision Prepared By ci~
Description Checked By Page 2
InitialIssue Changed title ofAttachment 1.


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320 King Street Alexandria, VA 22314 Calculation No.                  Prepared By Page 3 085-295-02 CONTENTS Section                                                                           .~Pa e 1.0       PURPOSE 2.0      
 
tiiMXu Calculation No.
085-295-02 Prepared By p~~
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320 King Street Alexandria, VA 22314 Page 3
CONTENTS Section 1.0 2.0 PURPOSE


==SUMMARY==
==SUMMARY==
OF RESULTS 3.0       APPROACH 4.0       CALCULATION 5.0       OVERLAYLENGTH CALCULATION 6.0 ATI'ACHMENTS 1           SSFLAW Program Output 2           Examination Report for Weld 33-FW-22 dated 5/15/97
OF RESULTS
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3.0 APPROACH 4.0 CALCULATION 5.0 OVERLAYLENGTHCALCULATION 6.0 ATI'ACHMENTS 1
SSFLAW Program Output 2
Examination Report for Weld 33-FW-22 dated 5/15/97
 
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r~~MX R                                                                      320 King Street Alexandria, VA 22314 Calculation No.                     Prepared By Page 4 085-295-02 1.0       PURPOSE The purpose of this calculation is to determine the thickness of an overlay to be installed at the location of Weld 33-FW-22 in the NMP-1 RWCU piping system.
320 King Street Alexandria, VA 22314
2.0      
> og lg Calculation No.
085-295-02 Prepared By Page 4
1.0 PURPOSE The purpose of this calculation is to determine the thickness of an overlay to be installed at the location ofWeld 33-FW-22 in the NMP-1 RWCU piping system.
2.0


==SUMMARY==
==SUMMARY==
The overlay size is:
The overlay size is:
Thickness:           0.25-inch minimum Length:              25-inch minimum, centered on the nozzle side edge of the weld crown 3.0       APPROACH In 1988 NMPC obtained computer program SSFLAW, which calculates overlay sizes using the method presented in Reference 1. Reference 2 describes the program, its development, and use, and provides a user manual for the program.
Thickness:
The program performs the following operations:
Length:
SSFLAW assumes the crack extends 360 degrees around the pipe and penetrates fully through the original pipe walL The crack is assumed to stop at the overlay.
0.25-inch minimum 25-inch minimum, centered on the nozzle side edge of the weld crown 3.0 APPROACH In 1988 NMPC obtained computer program SSFLAW, which calculates overlay sizes using the method presented in Reference 1. Reference 2 describes the program, its development, and use, and provides a user manual for the program.
The program performs the followingoperations:
SSFLAW assumes the crack extends 360 degrees around the pipe and penetrates fullythrough the original pipe walL The crack is assumed to stop at the overlay.


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lXLMPR                                                                        320 King Street Alexandria, VA 22314 Calculation No.                     Prepared By                       Checked By Page 5 085-295-02 SSFLAW then uses the stresses applied to the section to determine the overlay thickness needed to prevent plastic collapse of the section, including a factor of safety of 2.77 as required by NUREG-0313, Revision 2.
320 King Street Alexandria, VA 22314 Calculation No.
4.0       CALCULATION 4.1       Pro       m SSFLAWIn uts Appendix A to the SSFLAW user's manual (Reference 2) describes the inputs required to run the program. The required inputs for overlay sizing are listed below, along with the values to be used in the pI'ograIn.
085-295-02 Prepared By Checked By Page 5
                  '
SSFLAW then uses the stresses applied to the section to determine the overlay thickness needed to prevent plastic collapse of the section, including a factor ofsafety of 2.77 as required by NUREG-0313, Revision 2.
              , e        e i   t     Int n i         n       d     n h     . SSFLAWdefaultvalues for these parameters are used. The program calculates these parameters       for Type 304 material at the input temperature of the system (discussed below).
4.0 CALCULATION 4.1 Pro m SSFLAWIn uts Appendix Ato the SSFLAW user's manual (Reference 2) describes the inputs required to run the program. The required inputs for overlay sizing are listed below, along with the values to be used in the pI'ograIn.
0   eratin Tem erature. Per Reference 3, the design nozzle temperature is 575'F.
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Pressure. Per Reference 3, the design pressure of the nozzle is 1300 psig.
e i t
Pi   e Outside Diameter and Wall Thickness.     Per Reference 3, the weld is in nominal 6-inch piping (6.625-inch actual OD) with 0.38-inch minimum wall thickness.
Int n i n
d n
h
. SSFLAWdefaultvalues for these parameters are used. The program calculates these parameters forType 304 material at the input temperature of the system (discussed below).
0 eratin Tem erature. Per Reference 3, the design nozzle temperature is 575'F.
Pressure.
Per Reference 3, the design pressure ofthe nozzle is 1300 psig.
Pi e Outside Diameter and Wall Thickness.
Per Reference 3, the weld is in nominal 6-inch piping (6.625-inch actual OD) with 0.38-inch minimum wall thickness.


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/LIMPR                                                                          320 King Street Alexandria, VA 22314 Calculation No.                       Prepared By Page 6 085-295-02 A   lied Stresses. Stresses are calculated in Reference 4 as follows:
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Applied Tensile Stress;                               0.4 ksi Applied Bending Stress:                                12.0 ksi Note that the above stresses include secondary stresses due to thermal expansion. Treating thermal stresses   as primary stresses is required by NUREG-0313, Revision 2 for overlays fabricated from SMAW weld metal. Per the SSFLAW user manual, pressure stress is calculated separately by the program and so is not to be included in the input stresses.
320 King Street Alexandria, VA 22314 Calculation No.
Note that the following parameters are speciQed for input into Program SSFLAW but are not needed for the overlay sizing calculation method:
085-295-02 Prepared By Page 6
                                          'eld Type Residual Stress State Haw Orientation, Length and Depth Service Interval Reference Source for Allowable Haw Size Therefore, for Program SSFLAW runs made in this calculation, the input values for these parameters are selected as default values.
A lied Stresses.
Pro     m SSFLAW Results Attachment    1 presents   the printout from Program SSFLAW run for the above inputs. The results show that an overlay thickness of 0.25-inch minimum is acceptable for the applied stresses.
Stresses are calculated in Reference 4 as follows:
Applied Tensile Stress; Applied Bending Stress:
0.4 ksi 12.0 ksi Note that the above stresses include secondary stresses due to thermal expansion.
Treating thermal stresses as primary stresses is required by NUREG-0313, Revision 2 for overlays fabricated from SMAWweld metal. Per the SSFLAW user manual, pressure stress is calculated separately by the program and so is not to be included in the input stresses.
Note that the followingparameters are speciQed for input into Program SSFLAW but are not needed for the overlay sizing calculation method:
'eld Type Residual Stress State Haw Orientation, Length and Depth Service Interval Reference Source forAllowable Haw Size Therefore, for Program SSFLAW runs made in this calculation, the input values for these parameters are selected as default values.
Pro m SSFLAW Results presents the printout from Program SSFLAW run for the above inputs. The results show that an overlay thickness of0.25-inch minimum is acceptable for the applied stresses.
Program SSFLAW was developed and used in accordance with the MPR Associates Quality Assurance Program.
Program SSFLAW was developed and used in accordance with the MPR Associates Quality Assurance Program.


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320 King Street Alexandria, VA 22314 Calculation No.                   Prepared By                     Checked By Page 7 085-29542 5.0         OVERLAYLENGTH CALCULATION Code Case N-504 (Reference 5) provides the foHowing instruction for determining the length of the overlay required beyond each edge of the observed flaws:
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Length     = 0.75     ( R )   ( t   )
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where R = outer radius and t = nominal wall thickness of pipe.
320 King Street Alexandria, VA 22314 Calculation No.
085-29542 Prepared By Checked By Page 7
5.0 OVERLAYLENGTHCALCULATION Code Case N-504 (Reference 5) provides the foHowinginstruction for determining the length of the overlay required beyond each edge of the observed flaws:
Length
= 0.75
( R
)
( t )
where R = outer radius and t = nominal wall thickness ofpipe.
Accordingly, the required overlay length beyond each end of the observed flaws for this 6-inch OD, schedule 80 pipe is:
Accordingly, the required overlay length beyond each end of the observed flaws for this 6-inch OD, schedule 80 pipe is:
Length     = 0.75       (6. 625"   /   2) (0. 432")   = 0. 9" Per Reference 6 (Attachment 2), the observed length of the indication is 0531-inch (equal to 7/16-inch plus 3/32-inch). The required length is then:
Length
0.531" + 2 (0.9") = 2.33" Use 2.5-inch minimum length centered on the nozzle side edge of the weld crown.
= 0.75 (6. 625" / 2) (0. 432")
= 0. 9" Per Reference 6 (Attachment 2), the observed length of the indication is 0531-inch (equal to 7/16-inch plus 3/32-inch). The required length is then:
0.531" + 2 (0.9") = 2.33" Use 2.5-inch minimum length centered on the nozzle side edge ofthe weld crown.


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Calculation No.
085-295-02 Prepared By 6-Checked By Page 8


==5.0       REFERENCES==
==5.0 REFERENCES==
"Evaluation ofFlaws in Austenitic Steel Piping," Section XITask Group forPiping Flaw Evaluation (ASME Code), Journal OfPressure Vessel Technology, Volume 108, No. 3, August 1986.
2.
MPR Report MPR-1037, Revision 1, "SSFLAW AComputer Program to Evaluate Cracks in Stainless Steel Piping (Version 1.1)," April1988.
3.
Southwestern Engineering Company Drawing 77528, Rev. 17, "Regenerative Clean-up Heat 4
Exchanger" (forRWCU HXND-03).
4.
MPR Calculation 085-295-01, "NMP-1 RWCU Weld 33-FW-22 Overlay Design, Stresses for Input to Program SSFLAW," Revision 0.
5.
ASMEBoilerAnd Pressure Vessel Code Case N-504, dated April30, 1992.
6.
NMPC Radiographic Examination Report forWeld 33-FW-22 dated 5/15/97. Pncluded as I.]


          "Evaluation of Flaws in Austenitic Steel Piping," Section XITask Group for Piping Flaw Evaluation (ASME Code), Journal Of Pressure Vessel Technology, Volume 108, No. 3, August 1986.
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: 2.        MPR Report MPR-1037, Revision      1, "SSFLAW A Computer Program to Evaluate Cracks in Stainless Steel Piping (Version 1.1)," April 1988.
320 King Street Alexandria, VA 22314
: 3.        Southwestern Engineering Company Drawing 77528, Rev. 17, "Regenerative Clean-up Heat 4
/D OP /$
Exchanger" (for RWCU HX ND-03).
Calculation No.
: 4.        MPR Calculation 085-295-01, "NMP-1 RWCU Weld 33-FW-22 Overlay Design, Stresses for Input to Program SSFLAW," Revision 0.
085-295-02 Prepared By Mcs~
: 5.        ASME Boiler And Pressure Vessel Code Case N-504, dated April 30, 1992.
Checked By Page 1
: 6.        NMPC Radiographic Examination Report for Weld 33-FW-22 dated 5/15/97. Pncluded        as I
ATTACHMENT1 SSFLAW Program Output
Attachment 2.]


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ra1MPR                                                320 King Street Alexandria, VA 22314 Calculation No.        Prepared By              Checked By 085-295-02      M cs~                                              Page 1 ATTACHMENT1 SSFLAW Program Output


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SSFLAW Version 1.1 (April 5, 1988)
ATI'ACHMENT SSFLAW Of t$         Version 1.1                             OF (April 5, 1988)
ATI'ACHMENT OF Overlay Sizing Calculation Results 33-FW-22 Weld Overlay Sizing Date: 5/16/97 Pipe Material: Type 304 Stainless Steel Sm= 16.67 ksi Sy= 18.50 ksi Pipe Geometry:
Overlay Sizing Calculation Results 33-FW-22 Weld Overlay   Sizing Date: 5/16/97 Pipe Material: Type 304 Stainless Steel Sm= 16.67 ksi Sy= 18.50 ksi Pipe Geometry:                          System Operating Conditions:
Outside Diameter=
Outside Diameter=     6.625 in           Pressure= 1300.0 psig Wall Thickness=      0.380  in          Temperature= 575.0     F Normal Conditions          Faulted Conditions Tensile Stress   (ksi)                 0.40                          0.40 Bending Stress   (ksi)               12.00                        12.00 Pressure Stress (ksi)                   5.02                         5.02 Required Weld Overlay Dimensions:
Wall Thickness=
Overla Thickness= 0.233 in verlay Length=         1.
6.625 in 0.380 in System Operating Conditions:
Pressure=
1300.0 psig Temperature=
575.0 F
Tensile Stress (ksi)
Bending Stress (ksi)
Pressure Stress (ksi)
Normal Conditions 0.40 12.00 5.02 Faulted Conditions 0.40 12.00 5.02 Required Weld Overlay Dimensions:
Overla Thickness=
0.233 in verlay Length=
1.


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WMPR                                                                  320 King Street Alexandria, VA 22314 Calculation No.                 Prepared By                   Checked By Page 1 085-295-02 ATTACHMENT2 Radiographic Examination Report for Weld 33-FiV-22 dated 5/15/97
/2 MPR Associates, Inc.
320 King Street Alexandria, VA 22314 Calculation No.
085-295-02 Prepared By Checked By Page 1
ATTACHMENT2 Radiographic Examination Report forWeld 33-FiV-22 dated 5/15/97


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Latest revision as of 11:46, 9 January 2025

Rev 1 to Ssflaw Overlay Size
ML17059B562
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 05/16/1997
From: Trench R
MPR ASSOCIATES, INC.
To:
Shared Package
ML17059B563 List:
References
085-295-02, 085-295-02-R01, 85-295-2, 85-295-2-R1, S14-33M009, S14-33M9, NUDOCS 9705280089
Download: ML17059B562 (28)
v • d • e


Text

CALC

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320 King Street Alexandria, VA 22314 CALCULATIONTITLE PAGE Client Project Title Niagara Mohawk Power Corporation NMP-1 RWCU Weld 33-FW-22 Overlay Design SSFLAW Overlay Size Page1of8

+ r4~u~avm Task No.

085-9708-295-0 Calculation No.

085-295-02 Preparer/Date Checker/Date Reviewer/Date Rev. No.

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~(r.(q7 QUALITYASSURANCE DOCUMENT his document has been prepared, checked, and reviewed in accordance with the Quality Assurance requirements of 10CFR50 Appendix B, as specified in the MPR Quality Assurance Manual.

9705280089 970519 PDR ADQCK 05000220 P

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gt4-EgH oo lilMPR MPR Associates, Inc.

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RECORD OF REVISIONS Calcuiation No.

085-2952 Revision Prepared By ci~

Description Checked By Page 2

InitialIssue Changed title ofAttachment 1.

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tiiMXu Calculation No.

085-295-02 Prepared By p~~

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320 King Street Alexandria, VA 22314 Page 3

CONTENTS Section 1.0 2.0 PURPOSE

SUMMARY

OF RESULTS

.~Pa e

3.0 APPROACH 4.0 CALCULATION 5.0 OVERLAYLENGTHCALCULATION 6.0 ATI'ACHMENTS 1

SSFLAW Program Output 2

Examination Report for Weld 33-FW-22 dated 5/15/97

I

CAu 5'll-3HOoR km~ O r~~MX R MPR Associates, Inc.

320 King Street Alexandria, VA 22314

> og lg Calculation No.

085-295-02 Prepared By Page 4

1.0 PURPOSE The purpose of this calculation is to determine the thickness of an overlay to be installed at the location ofWeld 33-FW-22 in the NMP-1 RWCU piping system.

2.0

SUMMARY

The overlay size is:

Thickness:

Length:

0.25-inch minimum 25-inch minimum, centered on the nozzle side edge of the weld crown 3.0 APPROACH In 1988 NMPC obtained computer program SSFLAW, which calculates overlay sizes using the method presented in Reference 1. Reference 2 describes the program, its development, and use, and provides a user manual for the program.

The program performs the followingoperations:

SSFLAW assumes the crack extends 360 degrees around the pipe and penetrates fullythrough the original pipe walL The crack is assumed to stop at the overlay.

st ~ =

A 4

1(

lXLMPR A. e MPR Associates, Inc.

320 King Street Alexandria, VA 22314 Calculation No.

085-295-02 Prepared By Checked By Page 5

SSFLAW then uses the stresses applied to the section to determine the overlay thickness needed to prevent plastic collapse of the section, including a factor ofsafety of 2.77 as required by NUREG-0313, Revision 2.

4.0 CALCULATION 4.1 Pro m SSFLAWIn uts Appendix Ato the SSFLAW user's manual (Reference 2) describes the inputs required to run the program. The required inputs for overlay sizing are listed below, along with the values to be used in the pI'ograIn.

e '

e i t

Int n i n

d n

h

. SSFLAWdefaultvalues for these parameters are used. The program calculates these parameters forType 304 material at the input temperature of the system (discussed below).

0 eratin Tem erature. Per Reference 3, the design nozzle temperature is 575'F.

Pressure.

Per Reference 3, the design pressure ofthe nozzle is 1300 psig.

Pi e Outside Diameter and Wall Thickness.

Per Reference 3, the weld is in nominal 6-inch piping (6.625-inch actual OD) with 0.38-inch minimum wall thickness.

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/LIMPR MPR Associates, Inc.

320 King Street Alexandria, VA 22314 Calculation No.

085-295-02 Prepared By Page 6

A lied Stresses.

Stresses are calculated in Reference 4 as follows:

Applied Tensile Stress; Applied Bending Stress:

0.4 ksi 12.0 ksi Note that the above stresses include secondary stresses due to thermal expansion.

Treating thermal stresses as primary stresses is required by NUREG-0313, Revision 2 for overlays fabricated from SMAWweld metal. Per the SSFLAW user manual, pressure stress is calculated separately by the program and so is not to be included in the input stresses.

Note that the followingparameters are speciQed for input into Program SSFLAW but are not needed for the overlay sizing calculation method:

'eld Type Residual Stress State Haw Orientation, Length and Depth Service Interval Reference Source forAllowable Haw Size Therefore, for Program SSFLAW runs made in this calculation, the input values for these parameters are selected as default values.

Pro m SSFLAW Results presents the printout from Program SSFLAW run for the above inputs. The results show that an overlay thickness of0.25-inch minimum is acceptable for the applied stresses.

Program SSFLAW was developed and used in accordance with the MPR Associates Quality Assurance Program.

e.~~

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iiiMPu d'+ lc MPH Associates, Inc.

320 King Street Alexandria, VA 22314 Calculation No.

085-29542 Prepared By Checked By Page 7

5.0 OVERLAYLENGTHCALCULATION Code Case N-504 (Reference 5) provides the foHowinginstruction for determining the length of the overlay required beyond each edge of the observed flaws:

Length

= 0.75

( R

)

( t )

where R = outer radius and t = nominal wall thickness ofpipe.

Accordingly, the required overlay length beyond each end of the observed flaws for this 6-inch OD, schedule 80 pipe is:

Length

= 0.75 (6. 625" / 2) (0. 432")

= 0. 9" Per Reference 6 (Attachment 2), the observed length of the indication is 0531-inch (equal to 7/16-inch plus 3/32-inch). The required length is then:

0.531" + 2 (0.9") = 2.33" Use 2.5-inch minimum length centered on the nozzle side edge ofthe weld crown.

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5A s i<- % Mow tsiMPR MPR Associates, Inc.

320 King Street Alexandria, VA 22314 g gp /+

Calculation No.

085-295-02 Prepared By 6-Checked By Page 8

5.0 REFERENCES

"Evaluation ofFlaws in Austenitic Steel Piping," Section XITask Group forPiping Flaw Evaluation (ASME Code), Journal OfPressure Vessel Technology, Volume 108, No. 3, August 1986.

2.

MPR Report MPR-1037, Revision 1, "SSFLAW AComputer Program to Evaluate Cracks in Stainless Steel Piping (Version 1.1)," April1988.

3.

Southwestern Engineering Company Drawing 77528, Rev. 17, "Regenerative Clean-up Heat 4

Exchanger" (forRWCU HXND-03).

4.

MPR Calculation 085-295-01, "NMP-1 RWCU Weld 33-FW-22 Overlay Design, Stresses for Input to Program SSFLAW," Revision 0.

5.

ASMEBoilerAnd Pressure Vessel Code Case N-504, dated April30, 1992.

6.

NMPC Radiographic Examination Report forWeld 33-FW-22 dated 5/15/97. Pncluded as I.]

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320 King Street Alexandria, VA 22314

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Calculation No.

085-295-02 Prepared By Mcs~

Checked By Page 1

ATTACHMENT1 SSFLAW Program Output

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SSFLAW Version 1.1 (April 5, 1988)

ATI'ACHMENT OF Overlay Sizing Calculation Results 33-FW-22 Weld Overlay Sizing Date: 5/16/97 Pipe Material: Type 304 Stainless Steel Sm= 16.67 ksi Sy= 18.50 ksi Pipe Geometry:

Outside Diameter=

Wall Thickness=

6.625 in 0.380 in System Operating Conditions:

Pressure=

1300.0 psig Temperature=

575.0 F

Tensile Stress (ksi)

Bending Stress (ksi)

Pressure Stress (ksi)

Normal Conditions 0.40 12.00 5.02 Faulted Conditions 0.40 12.00 5.02 Required Weld Overlay Dimensions:

Overla Thickness=

0.233 in verlay Length=

1.

WMPR 5'I4 - 39<o

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320 King Street Alexandria, VA 22314 Calculation No.

085-295-02 Prepared By Checked By Page 1

ATTACHMENT2 Radiographic Examination Report forWeld 33-FiV-22 dated 5/15/97

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