ML19332B867: Difference between revisions
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ATTAChWENT 1 | ATTAChWENT 1 | ||
Consumers Power Company Palisades Plant Docket 50-255 CRITERIA FOR DETERMINING JUSTIFICATION FOR CONTINUED OPERATION WHEN ENCOUNTERING DISCREPANCIES IN "AS-BUILT" SAFETY-RELATED PIPING November 13, 1989 | Consumers Power Company Palisades Plant Docket 50-255 CRITERIA FOR DETERMINING JUSTIFICATION FOR CONTINUED OPERATION WHEN ENCOUNTERING DISCREPANCIES IN "AS-BUILT" SAFETY-RELATED PIPING November 13, 1989 | ||
; | ; | ||
; | ; | ||
Line 43: | Line 35: | ||
p~T;jl | p~T;jl | ||
: r. y ., , | : r. y ., , | ||
.t-L' i?.l . . . | |||
.t-L' | |||
!: \ | !: \ | ||
G | G | ||
( | ( | ||
CRITERIA FOR DETERMINING JUSTIFICATION t | CRITERIA FOR DETERMINING JUSTIFICATION t | ||
l- FOR CONTINUED OPERATION WHEN ENCOUNTERING | l- FOR CONTINUED OPERATION WHEN ENCOUNTERING DISCREPANCIES IN "AS-BUILT" SAFETY-RELATED PIPING I | ||
DISCREPANCIES IN "AS-BUILT" SAFETY-RELATED PIPING | |||
I | |||
I l | I l | ||
CONSUMERS POWER COMPANY PALISADES PLANT | CONSUMERS POWER COMPANY PALISADES PLANT | ||
\ | \ | ||
l l | l l | ||
Line 67: | Line 48: | ||
0C1189-0010-NLO2 l l | 0C1189-0010-NLO2 l l | ||
i, | i, | ||
;, 7,.. . | ;, 7,.. . | ||
o , | o , | ||
, w .; - | , w .; - | ||
r;; . , | r;; . , | ||
~. =... . , _ . | ~. =... . , _ . | ||
t s . . J e? | t s . . J e? | ||
D- | D- | ||
: g. , -' '! | : g. , -' '! | ||
* TABLE OF CONTENTS PAGE. | * TABLE OF CONTENTS PAGE. | ||
1 7 | 1 7 | ||
< 'l.0 INTRODUCTION & SCOPE , . . ... . ... . . .... .. 1' ' | < 'l.0 INTRODUCTION & SCOPE , . . ... . ... . . .... .. 1' ' | ||
2.0 CRITERIA . . ..... .. . . .. . . . .. . . . ... . . 1 | 2.0 CRITERIA . . ..... .. . . .. . . . .. . . . ... . . 1 | ||
==3.0 CONCLUSION== | ==3.0 CONCLUSION== | ||
. . . . . . . . .. . . .. .. . ... . . . 6 | . . . . . . . . .. . . .. .. . ... . . . 6 | ||
'6 | '6 4.0' REFERENCES . .. ., . . . ... ..... . ... ... 6 t. | ||
4.0' REFERENCES . .. ., . . . ... ..... . ... ... 6 t. | |||
f\. | f\. | ||
r l | |||
r | 1 l | ||
l | |||
1 l' | 1 l' | ||
1 i | 1 i | ||
l' r | l' r | ||
l | l l | ||
i U.' . T l | |||
U.' . T l | |||
l I | l I | ||
l 1-t I | l 1-t I | ||
l' | l' | ||
: l. OC1189-0010-NLO2 i | : l. OC1189-0010-NLO2 i | ||
l | l | ||
U. | U. | ||
i < ., | i < ., | ||
.; . | .; . | ||
.. 1 i | .. 1 i | ||
ji | ji | ||
Line 131: | Line 88: | ||
AND SCOPE 1 | AND SCOPE 1 | ||
These criteria are intended to provide the operability determination requirements for safety-related piping and associated supports if it is determined that stresses exceed allowables presented in the Palisades Plant Updated FSAR (Reference 1). These criteria permit operation for an interim period only. Modifications will be made which return the system to within FSAR allowables. | These criteria are intended to provide the operability determination requirements for safety-related piping and associated supports if it is determined that stresses exceed allowables presented in the Palisades Plant Updated FSAR (Reference 1). These criteria permit operation for an interim period only. Modifications will be made which return the system to within FSAR allowables. | ||
These criteria are intended to be used to expeditiously perform necessary | These criteria are intended to be used to expeditiously perform necessary evaluations to determine interim operability and not to delay appropriate actions. | ||
evaluations to determine interim operability and not to delay appropriate actions. | |||
2.0 CRITERIA 1. | 2.0 CRITERIA 1. | ||
2.1 Piping Operability Criteria t. | 2.1 Piping Operability Criteria t. | ||
The piping analysis shall be in accordance with ANSI B31.1, 1973 1 | The piping analysis shall be in accordance with ANSI B31.1, 1973 1 | ||
1 Edition (Reference 2) with the load combination stress limit defined below. The 1973 Edition of ANSI B31.1 is judged to be a | 1 Edition (Reference 2) with the load combination stress limit defined below. The 1973 Edition of ANSI B31.1 is judged to be a comprehensive and updated consolidation of all of the requirements l of earlier editions of B31.1 used at Palisades. This edition constitutes use of a single reference encompassing all licensing requirements and is compatible with current computer software used by Consumers Power Company. The design loading conditions to be l | ||
comprehensive and updated consolidation of all of the requirements l of earlier editions of B31.1 used at Palisades. This edition constitutes use of a single reference encompassing all licensing requirements and is compatible with current computer software used by Consumers Power Company. The design loading conditions to be l | |||
applied in the analysis shall include the Safe Shutdown Earthquake. | applied in the analysis shall include the Safe Shutdown Earthquake. | ||
l OC1189-0010-NLO2 | l OC1189-0010-NLO2 | ||
m- s,% - | m- s,% - | ||
, ;, m ' u -1 V. ; *^ ? | |||
, ;, m ' u -1 | |||
V. ; *^ ? | |||
i | i | ||
!/ 3.: > | !/ 3.: > | ||
Line 160: | Line 103: | ||
+/t , , | +/t , , | ||
t h, | t h, | ||
1 i; . ' | 1 i; . ' | ||
l | l | ||
; | ; | ||
Y" FollowingLare the pipe stress criteria for justifying. continued sc . operation of the plant , | |||
Y" | u (S LP + SW p f 1.0Sy ] (Ref. 2 Equation 11)~ , | ||
FollowingLare the pipe stress criteria for justifying. continued sc . operation of the plant , | |||
u | |||
(S LP + SW p f 1.0Sy ] (Ref. 2 Equation 11)~ , | |||
And | And | ||
{Sgp + Sg7 + SSSE | {Sgp + Sg7 + SSSE | ||
* y) (** 9""U " | * y) (** 9""U " | ||
i Where: S tp = Longitudinal Pressure Stress S = Dead Weight Stress ; | i Where: S tp = Longitudinal Pressure Stress S = Dead Weight Stress ; | ||
WT r | WT r | ||
S = Stresses Resulting From Safe Shtitdown Earthquake SSE S = Material Yield Stress (Reference 3 Appendices) ' | S = Stresses Resulting From Safe Shtitdown Earthquake SSE S = Material Yield Stress (Reference 3 Appendices) ' | ||
y Code Case N-411 allows for increased damping values, independent of | y Code Case N-411 allows for increased damping values, independent of pipe diameter, for seismic analysis. Therefore, increased damping values, in accordance with "+'- ince 4, will be acceptable when performing these analyses to meet operability. If the piping stress analysis exceed the value of 2.0 S , or pipe supports do not , | ||
meet their operable limits (see Sect. 2.2), then additional iterative analysis of the piping may be required. The iterative analysis may l | |||
pipe diameter, for seismic analysis. Therefore, increased damping values, in accordance with "+'- ince 4, will be acceptable when performing these analyses to meet operability. If the piping stress analysis exceed the value of 2.0 S , or pipe supports do not , | |||
meet their operable limits (see Sect. 2.2), then additional iterative | |||
analysis of the piping may be required. The iterative analysis may l | |||
OC1189-0010-NLO2 f | OC1189-0010-NLO2 f | ||
F. | F. | ||
' +'4 | |||
' +'4 * | * o - | ||
o - | |||
,,... 3 k' | ,,... 3 k' | ||
t F | t F | ||
I | I use the knowledge that a support is not capable of withstanding the L loads, and can be removed from the analysis. The Code Case N-411 analysis will be an alternativa analysis procedure to that of the original piping seismic design methodology. Analysis employing Code Case N-411 will be performed based upon the requirement of US NRC Regulatory Guide 1.84, Rev. 26. (Reference 5) i For cases where piping secondary stresses (stresses induced by ! | ||
restraint of free end thermal displacement, thermal anchor movements or seismic anchor movements) are determined to exceed FSAR allowables, a specific case by case approach will be used to determine interim operability. | |||
use the knowledge that a support is not capable of withstanding the L loads, and can be removed from the analysis. The Code Case N-411 analysis will be an alternativa analysis procedure to that of the original piping seismic design methodology. Analysis employing Code | |||
Case N-411 will be performed based upon the requirement of US NRC Regulatory Guide 1.84, Rev. 26. (Reference 5) i For cases where piping secondary stresses (stresses induced by ! | |||
restraint of free end thermal displacement, thermal anchor movements or seismic anchor movements) are determined to exceed | |||
FSAR allowables, a specific case by case approach will be used to determine interim operability. | |||
t 2.2 Pipe Support & Hanger Operability Criteria As a first step in evaluating the support, a linear elastic analysis method will be used to determine the stress and forces in the support members. In addition to the loading in Section 2.1, the , | t 2.2 Pipe Support & Hanger Operability Criteria As a first step in evaluating the support, a linear elastic analysis method will be used to determine the stress and forces in the support members. In addition to the loading in Section 2.1, the , | ||
support loads must include pipe thermal loads, restraint of free end thermal displacement and anchor motion. The stresses and forces ! | support loads must include pipe thermal loads, restraint of free end thermal displacement and anchor motion. The stresses and forces ! | ||
calculated for each support member shall be compared with the allowables in the FSAR, Chapter 5.10.1.2 criteria for the SSE (Reference 1) combination except as modified below, l-i' d J | calculated for each support member shall be compared with the allowables in the FSAR, Chapter 5.10.1.2 criteria for the SSE (Reference 1) combination except as modified below, l-i' d J | ||
i 1 | i 1 | ||
OC1189-0010-NLO2 1 | OC1189-0010-NLO2 1 L , | ||
L , | |||
F.. | F.. | ||
5 ; . , ' ' '. < . . | 5 ; . , ' ' '. < . . | ||
J.. 4 f:' | J.. 4 f:' | ||
L l | L l | ||
Line 224: | Line 138: | ||
;. | ;. | ||
t Tension F t | t Tension F t | ||
y "* | |||
f 0.70 Su Bending F b | |||
f 0.70 Su | |||
Bending F b | |||
= 1.20 Sy but f 0.70 Su i | = 1.20 Sy but f 0.70 Su i | ||
t Shear F,, =. 0.72 Sy but f 0.42 Su- | t Shear F,, =. 0.72 Sy but f 0.42 Su-Combined Stress For axial compression and bending or axial tension and bending, use AISC Paragraph 1.6., (Ref. 6) | ||
Combined Stress For axial compression and bending or | |||
axial tension and bending, use AISC Paragraph 1.6., (Ref. 6) | |||
B. Anchor Bolts Use Factor of Safety of 2 ageinst ultimate tension and shear values, j I | B. Anchor Bolts Use Factor of Safety of 2 ageinst ultimate tension and shear values, j I | ||
l C. Snubbers i | l C. Snubbers i | ||
Line 242: | Line 149: | ||
l l | l l | ||
L D. Springs Load within catalog range without 1 L | L D. Springs Load within catalog range without 1 L | ||
i bottoming out | i bottoming out l OC1189-0010-NLO2 i l ) | ||
l a - - | |||
l OC1189-0010-NLO2 i l ) | |||
l | |||
a - - | |||
p y -> | p y -> | ||
ki L, * - | ki L, * - | ||
p2 1 5 | p2 1 5 | ||
K | K E. All remaining Catalog Items i | ||
H The maximum of the following: | |||
E. All remaining Catalog Items | |||
The maximum of the following: | |||
P i | P i | ||
l 1. Manufacturer's published faulted load rating. I | l 1. Manufacturer's published faulted load rating. I | ||
: 2. When faulted allowables are not given and the factor of safety is specified in the catalog for the normal operating allowable, a design allowable shall be scaled to e safety | : 2. When faulted allowables are not given and the factor of safety is specified in the catalog for the normal operating allowable, a design allowable shall be scaled to e safety factor of 2. | ||
: 3. When the catalog item is designed to B31.1 and no safety factor is given, a design allowable twice the catalog value, c | |||
factor of 2. | |||
: 3. When the catalog item is designed to B31.1 and no safety | |||
factor is given, a design allowable twice the catalog value, c | |||
: 4. When test data is available, the design allowable shall have a safety factor of 2.0. | : 4. When test data is available, the design allowable shall have a safety factor of 2.0. | ||
: 5. For a simple component item where an analysis can be performed, the allowable shall be 0.5 of the ultimate stresses or strength. | : 5. For a simple component item where an analysis can be performed, the allowable shall be 0.5 of the ultimate stresses or strength. | ||
Where: F t | Where: F t | ||
= Allowable Tensile Stress F = Allowable Bending Stress b | = Allowable Tensile Stress F = Allowable Bending Stress b | ||
Fy = Allowable Shear Stress | Fy = Allowable Shear Stress OC1189-0010-NLO2 | ||
OC1189-0010-NLO2 | |||
i' | i' | ||
] | ] | ||
,. s h | ,. s h | ||
S y | S y | ||
= Specified Minimum Yield Stress at Temperature (See Note 1) | = Specified Minimum Yield Stress at Temperature (See Note 1) | ||
{ | { | ||
; | ; | ||
H Su = Specified Minimum Tensile Stress at Temperature FS = Factor of Safety, Note 1: Actual yield strength may be used where CMTR's are available for the material. | |||
H Su = Specified Minimum Tensile Stress at Temperature | |||
FS = Factor of Safety, | |||
Note 1: Actual yield strength may be used where CMTR's are | |||
available for the material | |||
If a support fails using the linear elastic method, then a more refined anslysis may be performed using plastic analysis techniques. | If a support fails using the linear elastic method, then a more refined anslysis may be performed using plastic analysis techniques. | ||
The plastic analysis will follow the design rules of ASME Section III, Appendix F, (Ref.1), | The plastic analysis will follow the design rules of ASME Section III, Appendix F, (Ref.1), | ||
Line 315: | Line 180: | ||
==3.0 CONCLUSION== | ==3.0 CONCLUSION== | ||
If the above criteria cannot be met, reportability per 10 CFR 50 must be evaluated and system operabi14'y requirements per Plant Technical Specifications must be evaluated and appropriate actions taken. | If the above criteria cannot be met, reportability per 10 CFR 50 must be evaluated and system operabi14'y requirements per Plant Technical Specifications must be evaluated and appropriate actions taken. | ||
==4.0 REFERENCES== | ==4.0 REFERENCES== | ||
Line 326: | Line 189: | ||
: 2. ANSI B31.1, 1973 Power Piping Code. | : 2. ANSI B31.1, 1973 Power Piping Code. | ||
l OC1189-0010-NLO2 | l OC1189-0010-NLO2 | ||
~~t A. | ~~t A. | ||
* a | * a | ||
Line 337: | Line 197: | ||
: 3. American Society of Mechanical Engineers, Boiler and Pressure Vessel i ' | : 3. American Society of Mechanical Engineers, Boiler and Pressure Vessel i ' | ||
Codes Section III, 1983 Edition, through Winter 1985 Addenda. | Codes Section III, 1983 Edition, through Winter 1985 Addenda. | ||
. 1 | . 1 | ||
: 4. American Society of Mechanical Engineers, Boiler and Pressure Vessel Codes, Case N-411, Dated 9/17/84. | |||
: 4. American Society of Mechanical Engineers, Boiler and Pressure Vessel | |||
Codes, Case N-411, Dated 9/17/84 | |||
: 5. US Nuclear Regulatory Commission Regulatory Guide 1.84, Design and Fabrication Acceptability, ASME Section III, Division 1, July 1989, ! | : 5. US Nuclear Regulatory Commission Regulatory Guide 1.84, Design and Fabrication Acceptability, ASME Section III, Division 1, July 1989, ! | ||
Rev. 26, | Rev. 26, | ||
: 6. " Manual of Steel Construction", American Institute of Steel Construction, Inc., Seventh Edition, 1980. | : 6. " Manual of Steel Construction", American Institute of Steel Construction, Inc., Seventh Edition, 1980. | ||
Line 354: | Line 208: | ||
1 l | 1 l | ||
l l | l l | ||
OC1189-0010-NLO2 l | OC1189-0010-NLO2 l | ||
. . _ . . _ , _}} | . . _ . . _ , _}} |
Revision as of 16:26, 31 January 2020
ML19332B867 | |
Person / Time | |
---|---|
Site: | Palisades ![]() |
Issue date: | 11/13/1989 |
From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
To: | |
Shared Package | |
ML18054B104 | List: |
References | |
PROC-891113, NUDOCS 8911210113 | |
Download: ML19332B867 (10) | |
Text
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ATTAChWENT 1
Consumers Power Company Palisades Plant Docket 50-255 CRITERIA FOR DETERMINING JUSTIFICATION FOR CONTINUED OPERATION WHEN ENCOUNTERING DISCREPANCIES IN "AS-BUILT" SAFETY-RELATED PIPING November 13, 1989
l 8911210113 891113 PDR ADOCK 05000255 Q PDC 9 Pages l
t.
OC1189-0010-NLO2 t.
- - _ ~
p~T;jl
- r. y ., ,
.t-L' i?.l . . .
!: \
G
(
CRITERIA FOR DETERMINING JUSTIFICATION t
l- FOR CONTINUED OPERATION WHEN ENCOUNTERING DISCREPANCIES IN "AS-BUILT" SAFETY-RELATED PIPING I
I l
CONSUMERS POWER COMPANY PALISADES PLANT
\
l l
1 l
0C1189-0010-NLO2 l l
i,
- , 7,.. .
o ,
, w .; -
r;; . ,
~. =... . , _ .
t s . . J e?
D-
- g. , -' '!
- TABLE OF CONTENTS PAGE.
1 7
< 'l.0 INTRODUCTION & SCOPE , . . ... . ... . . .... .. 1' '
2.0 CRITERIA . . ..... .. . . .. . . . .. . . . ... . . 1
3.0 CONCLUSION
. . . . . . . . .. . . .. .. . ... . . . 6
'6 4.0' REFERENCES . .. ., . . . ... ..... . ... ... 6 t.
f\.
r l
1 l
1 l'
1 i
l' r
l l
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l I
l 1-t I
l'
- l. OC1189-0010-NLO2 i
l
U.
i < .,
.; .
.. 1 i
ji
1.0 INTRODUCTION
AND SCOPE 1
These criteria are intended to provide the operability determination requirements for safety-related piping and associated supports if it is determined that stresses exceed allowables presented in the Palisades Plant Updated FSAR (Reference 1). These criteria permit operation for an interim period only. Modifications will be made which return the system to within FSAR allowables.
These criteria are intended to be used to expeditiously perform necessary evaluations to determine interim operability and not to delay appropriate actions.
2.0 CRITERIA 1.
2.1 Piping Operability Criteria t.
The piping analysis shall be in accordance with ANSI B31.1, 1973 1
1 Edition (Reference 2) with the load combination stress limit defined below. The 1973 Edition of ANSI B31.1 is judged to be a comprehensive and updated consolidation of all of the requirements l of earlier editions of B31.1 used at Palisades. This edition constitutes use of a single reference encompassing all licensing requirements and is compatible with current computer software used by Consumers Power Company. The design loading conditions to be l
applied in the analysis shall include the Safe Shutdown Earthquake.
l OC1189-0010-NLO2
m- s,% -
, ;, m ' u -1 V. ; *^ ?
i
!/ 3.: >
2 s,'t'
+/t , ,
t h,
1 i; . '
l
Y" FollowingLare the pipe stress criteria for justifying. continued sc . operation of the plant ,
u (S LP + SW p f 1.0Sy ] (Ref. 2 Equation 11)~ ,
And
{Sgp + Sg7 + SSSE
- y) (** 9""U "
i Where: S tp = Longitudinal Pressure Stress S = Dead Weight Stress ;
WT r
S = Stresses Resulting From Safe Shtitdown Earthquake SSE S = Material Yield Stress (Reference 3 Appendices) '
y Code Case N-411 allows for increased damping values, independent of pipe diameter, for seismic analysis. Therefore, increased damping values, in accordance with "+'- ince 4, will be acceptable when performing these analyses to meet operability. If the piping stress analysis exceed the value of 2.0 S , or pipe supports do not ,
meet their operable limits (see Sect. 2.2), then additional iterative analysis of the piping may be required. The iterative analysis may l
OC1189-0010-NLO2 f
F.
' +'4
- o -
,,... 3 k'
t F
I use the knowledge that a support is not capable of withstanding the L loads, and can be removed from the analysis. The Code Case N-411 analysis will be an alternativa analysis procedure to that of the original piping seismic design methodology. Analysis employing Code Case N-411 will be performed based upon the requirement of US NRC Regulatory Guide 1.84, Rev. 26. (Reference 5) i For cases where piping secondary stresses (stresses induced by !
restraint of free end thermal displacement, thermal anchor movements or seismic anchor movements) are determined to exceed FSAR allowables, a specific case by case approach will be used to determine interim operability.
t 2.2 Pipe Support & Hanger Operability Criteria As a first step in evaluating the support, a linear elastic analysis method will be used to determine the stress and forces in the support members. In addition to the loading in Section 2.1, the ,
support loads must include pipe thermal loads, restraint of free end thermal displacement and anchor motion. The stresses and forces !
calculated for each support member shall be compared with the allowables in the FSAR, Chapter 5.10.1.2 criteria for the SSE (Reference 1) combination except as modified below, l-i' d J
i 1
OC1189-0010-NLO2 1 L ,
F..
5 ; . , ' ' '. < . .
J.. 4 f:'
L l
'A. Structural Steel
- .
t Tension F t
y "*
f 0.70 Su Bending F b
= 1.20 Sy but f 0.70 Su i
t Shear F,, =. 0.72 Sy but f 0.42 Su-Combined Stress For axial compression and bending or axial tension and bending, use AISC Paragraph 1.6., (Ref. 6)
B. Anchor Bolts Use Factor of Safety of 2 ageinst ultimate tension and shear values, j I
l C. Snubbers i
L l
Hydraulic: Load < manufacturers one time load capacity.
.I Movement < total travel !
l l
L D. Springs Load within catalog range without 1 L
i bottoming out l OC1189-0010-NLO2 i l )
l a - -
p y ->
ki L, * -
p2 1 5
K E. All remaining Catalog Items i
H The maximum of the following:
P i
l 1. Manufacturer's published faulted load rating. I
- 2. When faulted allowables are not given and the factor of safety is specified in the catalog for the normal operating allowable, a design allowable shall be scaled to e safety factor of 2.
- 3. When the catalog item is designed to B31.1 and no safety factor is given, a design allowable twice the catalog value, c
- 4. When test data is available, the design allowable shall have a safety factor of 2.0.
- 5. For a simple component item where an analysis can be performed, the allowable shall be 0.5 of the ultimate stresses or strength.
Where: F t
= Allowable Tensile Stress F = Allowable Bending Stress b
Fy = Allowable Shear Stress OC1189-0010-NLO2
i'
]
,. s h
S y
= Specified Minimum Yield Stress at Temperature (See Note 1)
{
H Su = Specified Minimum Tensile Stress at Temperature FS = Factor of Safety, Note 1: Actual yield strength may be used where CMTR's are available for the material.
If a support fails using the linear elastic method, then a more refined anslysis may be performed using plastic analysis techniques.
The plastic analysis will follow the design rules of ASME Section III, Appendix F, (Ref.1),
3.0 CONCLUSION
If the above criteria cannot be met, reportability per 10 CFR 50 must be evaluated and system operabi14'y requirements per Plant Technical Specifications must be evaluated and appropriate actions taken.
4.0 REFERENCES
l l
- 1. Palisades Plant Updated Final Safety Analysis Report.
l
- 2. ANSI B31.1, 1973 Power Piping Code.
l OC1189-0010-NLO2
~~t A.
- a
,V y : l
.;' '
7 1 l-f-
- 3. American Society of Mechanical Engineers, Boiler and Pressure Vessel i '
CodesSection III, 1983 Edition, through Winter 1985 Addenda.
. 1
- 4. American Society of Mechanical Engineers, Boiler and Pressure Vessel Codes, Case N-411, Dated 9/17/84.
- 5. US Nuclear Regulatory Commission Regulatory Guide 1.84, Design and Fabrication Acceptability, ASME Section III, Division 1, July 1989, !
Rev. 26,
- 6. " Manual of Steel Construction", American Institute of Steel Construction, Inc., Seventh Edition, 1980.
-1 l
l l
l l
l I
1 l
l l
OC1189-0010-NLO2 l
. . _ . . _ , _