ML20062C717
| ML20062C717 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, McGuire, Perkins, Cherokee  |
| Issue date: | 11/02/1978 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Dail L DUKE POWER CO. |
| Shared Package | |
| ML20062C721 | List: |
| References | |
| NUDOCS 7811130377 | |
| Download: ML20062C717 (2) | |
Text
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UNITED STATES.
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NUCLEAR REGULATORY COMMISSION j
g aj WASHINGTON. D. C. 20555
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NOV 2 1978 e.
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Docket Nos: STN 50-488 STN 50-491" '
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m SIN 50-489 STN 50-492
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d; SIN 50-490 STN 50-493 Mr. L. C. Dail, Vice President I
Design Engineering DeEartment
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'j Duke Power Company 3
1 P. O. Box 33189 j
01arlotte, North Carolina 28242 fl
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Dear Mr. Dail:
SUBJECT:
CRITERIA 10R PIPING 50 DELI,ING TEGNIQUE - STRUCTURAL OVERLAPPING
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(PROJECT 81 - PERKINS NUCLEAR STATION, UNITS 1, 2 AND 3, AND
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GEROKEE NUCLEAR STATION, UNITS 1, 2 AND 3)
By our letter of October 3,1978, from Robert Baer, Chief, Light Water Reactors Branch No. 2, Division of Project Management to William O. Parker, Jr., Vice President, Steam Production, Duke Power Company, we concluded that a method for modelling piping systems for static and dynamic analysis was acceptable for the criteria used in the analysis for the McGuire Nuclear Statica, Units 1 and 2.
We also stated that for all other Duke Power plants undergoing licensing review we shall require a commitment that I
whenever this technique is employed in the future the requirements l
listed in the letter be adopted and documented in the appropriate safety analysis report. A copy of the letter is enclosed.
Please advise kfiether this technique (structural overlapping) will (3
- be used in modeiling and analyzing pipe systems for Project 81
~
(Perkins and" Cherokee facilities). If it will, advise whether recuirements 1 and 2 in the October 3,1978 letter will be adopted p
anc. documented in the Final Safety Analysis Report (s).
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teven A. Varga, lef a Light Water Reactors Brarkh No. 4 Division of Project Management i
Enclosure:
As stated cc: See next page f
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l Duke Power Company NOV 2 1978 ces:
William L. Porter, Esq.
Elizabeth S. Bowers, Esq.
1 Associate General Counsel Chairman Duke Power Company Atomic Safety and Licens.ing Board j-Charlotte, North Carolina 28242 U. S. Nuclear Regulatory Comission
'j Washington, D. C.
20555 J. Michael McGarry, III, Esq.
Debevoise & Liberman Dr. Donald P. deSylva 700 Shoreham Building Associate Professor of Marine Science ll 806 Fifteenth Street, N. W.
Rosenstiel School of Marine and i
Washington, D. C.
20005 Atmospheric Science i!
Uni've'sity of Miama r
j William A. Raney, Jr.
Miami, Florida 33149 l
Special Deputy Attorney General Attorney for the State of Dr. Walter H. Jordan i
North Ca-olina 881 W. Outer Drive Department of Justice Oak Ridge, Tennessee 37830 P
().
P. O. Box 629 Raleigh, North Carolina 27602 Allan S. Rosenthal, Chiarman Atomic Safety and Licensing Mary Apperson Davis, Chairman Appeal Board Yadkin River Comittee U. S. Nuclear Regulatory Comission
!j Route 4, Box 261 Washington, D. C.
20555 Mocksvii'e, North Carolina 27028 4
Dr. John H. Buck Thomas S. Erwin, Esq.
Atomic Safety and Licensing Appeal Board P. O. Box 928 U. S. Nuclear Regulatory Comission Raleigh, North Carolina 27602 Washington, D. C.
20555 David Springer Richard S. Salzman, Esq.
The Point Farm Atomic Safety and Licensing Appeal Board Route 4 U. S. Nuclear Regulatory Comission
~
Mocksville, North Carolina 27028 Washington, D. C.
20555 (3)
William G. Pfefferkorn, Esq.
~
2124 Wachovia Building Winston-Salem, North Carolina 27101 Richard P. Wilson, Esq.
Assistant Attorney General S. C. Attorney General's Office P. O. Box 11549 Columbia, South Carolina 29211 i
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Docket FTle ~
R. Baer F. Cherny i
NRC PDR
& Birkell R. Kiessel l
Local PDR J. Lee H. Brammer NOV 2 1978 LWR #2 File OELD V. Brounlee, Region II D. Vassallo IE (3)
G. Reinmuth, IE F. Williams M. Hartzman E. Ketchen,(0 ELD)
E. Sullivan Docket Nos. 50-369 03 3 ma' i
and 50-370 BCC: JBuchanan l
TAbernathy ACRS (16)
Mr. William O. Parker, Jr.
Vice President, Steam Production Duke Power Company P. O. Box 2178 422 South Church Street Charlotte,f(orth Cardlina 28242
Dear Mr. Parker:
l lI
SUBJECT:
CRITERIA FOR PIPING MODELLING TECHNIQUE - STRUCTURAL i
OVERLAPPI!iG (MC GUIRE NUCLEAR STATION, UNITS 1 & 2) i
( f We have completed our review of the nothods which you use in r.odellinc piping systems for static and dynamic system analysis for the Mc Guire Nuclear Station. We have concluded that this technique (structural overlapping) may be used.in an acceptable fashion provided that the following considerations are satisfied:
1.
Since the validity of the method is improved as the overlap region takes on the characteristics of a rigid section*, a section of a piping syste;n shall be defined as an overlap region if the following requirements are satisified:
a.
The section contains a mintaura of four (4) restraints in each of three perpendicular directions.
b.
The restraints in the section are so spaced that the pipe
(~;
span between any two restraints, taken as simply suoported s
beams, have a fundamental natural frequency (bending and torsion) not less than 33 Hz.
j, c.
In lieu of the criterion in 1b, a dynamic analysis.of the overlap region should be made with pinned boundaries extended beyond the overlap region either to the next actual support or to a span length equal to the largest span length within i
the region. The fundamental frecuency determined from thi,s j i,
analysis should be greater than 33 Hz.
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- Asectionmaybeconsideredrigidwhensubjectedtoseismicexcitation if its natural frequencies are greater than 33 Hz.
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NOV 2 1978 Mr. William O. Parker, Jr. OCT 3 1973
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i 2.
If a subsystem natural frequency falls in close proximity to a response spectrum peak, this peak value should be applied in the stress evaluation.
Although the criteria used for Mc Guire is acceptable and may be p
p continued to be applied on this plant; for all other Duke Power plants l:
undergoing licensing review we shall require a comitment that whenever l
this technique is ecployed in the future the requirements listed above i
be adopted and documented in the appropriate safety analysis report.
I Sincerely.
t Robert Baer, Chief Light Water Reactors Branch No. 2 5
Division of Project Management
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l Mr. William 0. Parker, Jr.
NOV 2 B78 g Vice President, Steam Production Duke Power Company P. O. Box 2173 422 South Church Street Charlotte, North Carolina 28242 cc: Mr. W. L. Porter Duke Power Company ill P. O. Box 2178 422 South Church Street a
Charlotte, North Carolina 28242 fi F
Hr. R. S. Howard Power Systems Divisitn i
Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 Mr. E. J. Keith
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220 Montgomery Street EDS Nuc1 car Incorporated San Francisco, California 94104 Mr. J. E. Houghtaling NUS Corporation 253G Countryside Boulevard Clearwater, Florida 33615 6
i Hr. Jesse L. Riley, President The Carclina Environmental Study Group 854 Henley Place Charlotte, North Carolina 28207 J. Michael McGarry, III, Esq.
-3 Debevoise & Liberman 700 Shorcham Building 006 15th Street, N. U.
Washington, D. C.
20005
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Shelley Blum, Esq.
418 Lau Building
- /30 East Trade Street Charlotte, North Carolina 28202 1
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NOV 2 1978
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cc: Robert M. Lazo. Esq., Chairman j
(AtomicSafetyandLicensingBoard
- t U. S. Iluclear Regulatory Cosmission l!
Washington, D. C.,
20555 b.-
Dr. 'Er:neth A. Luebte O.
, Atomic Safety and Licensing Coard l!
U. S. Nuclear Regulatory Co=nission Washington, D. C.
20555 Dr' Cadet H. Hand, Jr.,' Director j
Bodegd 11arine Lab of California i l P. O. Box 247
,,1 Bodega Bay, California 94923 1
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UNITED STATES _
-l NUCLEAR REGULATORY COMMISUON g
a WASHINGTON, D. C. 20555 s
- ,/
NOV 2 1978 l
z.
- I, -.
Docket Nos: STN 50-488 SIN 50-491' ' ' i SIN 50-489 STN 50-492
~ " " -
d SIN 50-490 STN 50-493 Mr. L. C. Dail, Vice President h
Design Engineering DeRartment
,9
]
Duke Power Company
't P. O. Box 33189
.]
01arlotte, North Carolina 28242 1i
Dear Mr. Dail:
SUBJECT:
CRITERIA IOR PIPING 50 DELI,ING TEON QUE - STRUClVRAL OVERLAPPING
(. )
(PROJECT 81 - FERKINS NUCLEAR STATION, UNITS 1, 2 AND 3, AND
~
OIEROKEE NUCLEAR STATION, UNITS 1, 2 AND 3) t By our letter of October 3,1978, from Robert Baer, Chief, Light Water Reactors Branch No. 2, Division of Project Management to William O. Parker, Jr., Vice President, Steam Production, Duke Power Company, we concluded that a method for m delling piping systems for static and dynamic analysis was acceptable for the criteria used in the analysis for the htGuire Nuclear Station, Units 1 and 2.
We also stated that for all other Duke Power plants undergoing licensing review we shall require a commitment that whenever this technique is employed in the future the requirements j
listed in the letter be adopted and documen*,ed in the appropriate 1
safety analysis report. A copy of the letter is enclosed.
Please advise sfiether this technique (structural overlapping) will (3
~be used in modelling and analyzing pipe systems for Project 81 (Perkins and" Cherokee facilities).
If it will, advise whether
[
recuirements 1 and 2 in the October 3,1978 letter will be adopted anc documented in the Final Safety Analysis Report (s).
I f
Sik
- rely,
(
$4%
l.4.k tevenA.gVargaI diief Light Water Reactors Bra h No. 4 Division of Project Management i
Enclosure:
As stated i
cc: See next page f,r[
7 811130377 ' M gf 03
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,c__
e Duke Power Company NOV 2 1978 l
CCs:
William L. Porter, Esq.
Elizabeth S. Bowers, Esq.
4 Associate General Counsel Chairman Duke Power Campany Atomic Safety and Licensing Board
.1 l:
Charlotte, North Carolina 28242 U. S. Nuclei.r Regulatory Commission
'j Washington, D. C.
20555 J. Michael McGarry, III, Esq.
t Debevoise & Liberman Dr. Donald P. deSylva 700 Shoreham Building Associate Professor of Marine Science 806 Fifteenth Street, N. W.
Rosenstiel School of Marine and i {'
Washington, D. C.
20005 Atmospheric Science Uni'versity of Miama William A. Raney, Jr.
Miami, Florida 33149 Special Deputy Attorney General Attorney for the State of Dr. Walter H. Jordan North Carolina 881 W. Outer Drive Department of Justice Oak Ridge, Tennessee 37830 l
(.,)
P. O. Box 629 Raleigh, North Carolina 27602 Allan S. Rosenthal, Chiarman Atomic Safety and Licensing Mary Apperson Davis, Chairman Appeal Board Yadkin River Committee U. S. Nuclear Regulatory Commission 3
Route 4, Box 261 Washington, D. C.
20555 Mocksville, North Carolina 27028 Dr. John H. Buck Thomas S. Erwin, Esq.
Atomic Safety and Licensing Appeal Board i
P. O. Box 928 U. S. Nuclear Regulatory Commission Raleigh, North Carolina 27602 Washington, D. C.
20555 David Springer Richard S. Salzman, Esq.
The Point Farm Atomic Safety and Licensing Appeal Board i
Route 4 U. S. Nuclear Regulatory Commission Mocksville, North Carolina 27028 Washington, D. C.
20555
(,)
William G. Pfefferkorn, Esq.
2124 Wachovia Building Winston-Salem, North Carolina 27101
]
Richard P. Wilson, Esq.
Assistant Attorney General
'j S. C. Attorney General's Office j
P. O. Box 11549 j
Columbia, South Carolina 29211 i
1-
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e Distributim :
bc/d.su rd I
S.
i Docket File R. Baer F. Cherny HRC PDR IM Birkell R. Kiessel Local PDR J. Lee H. Brammer NOV 2 1978i' V. Brounlee, Region II i
LWR #2 File OELD D. Vassallo IE (3)
G. Reinmuth, IE F. Williams M. Hartzman E. Ketchen,(OELD) l E. Sullivan Docket Nos. EO-369 03 3 1978' and 50-370 BCC: JBuchanan i
TAbernathy ACRS (16)
Mr. William O. Parker, Jr.
Vice President, Steam Production i
Duke Power Company P. O. Box 2178 i
422 South Church Street 1
Charlotte, North Cardlina 28242
Dear Mr. Parker:
SUBJECT:
CRITERIA FOR PIPING MODELLING TECHNIQUE - STRUCTURAL i
OVERLAPPI!iG (MC GUIRE NUCLEAR STATI0H, UNITS 1 & 2) 1
/;
We have completed our review of the nothods which you use in modelling piping systems for static and dynamic system analysis for the Mc Guire Nuclear Station. We have concluded that this technique (structural overlapping) may be used.in an acceptable fashion provided that the following considerations are satisfied:
1.
Since the validity of the method is improved as the overlap region takes on the characteristics of a rigid section*, a section of a piping system shall be defined as an overlap region if the following requirements are satisified:
a.
The section contains a mintaum of four (4) restraints in each of three perpendicular directions.
b.
The restraints in the section are so spaced that the pipe
(;
span between any two restraints, taken as simply suoported s
beams, have a fundamental natural frequency (bending and torsion) not less than 33 Hz.
j, c.
In lieu of the criterion in ib, a dynamic analysis.of the overlap region should be made with pinned boundaries extended beyond the overlap region either to the next actual support or to a span length equal to the largest span length within the region. The fundamental frecuency determined from thi,s,.
t, analysis should be greater than 33 Hz.
l WP : 7fr lohoco3 Jupp y
' *A section may be considered rigid when subjected to seismic excitation if its natural frequencies are greater than 33 Hz.
- 1 ee rse s >
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NOV 2 1978 Fir. William O. Parker, Jr. OCT 3 1973 n
f 2.
If a subsystem natural frequency falls in close proximity to a response spectrum peak, this peak value should be applied in the stress evaluation.
Although the criteria used for Mc Guire is acceptable and may be y
continued to be applied on this plant; for all other Duke Power plants r
undergoing licensing review we shall require a comitment that whenever
.l this technique is ecployed in the future the requirements listed above j
be adopted and documented in the appropriate safety analysis report.
)
Sincerely,
/
.I Robert Baer Chief l;
Light Water Rsactors Bran:h No. 2 Division of Project F.anagement n
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Hr. William 0. Parker, Jr.
NOV 2 G78 i Vice President, Steam Production l
Duke Power Company P. O. Box 2173 422 South Church Street Charlotte, North Carolina 28242 h
cc: Mr. W. L. Porter l
ld I
Duke Pcuer Company P. O. Box 2178 422 South Church Street q!.
Charlotte, North Carolina 28242
?!
. Hr. R. S. Howard Power Systems Division a
Westinchcuse Electric Corporation P. O. Cox 355 Pittsburgh, Pennsylvania 15230 Mr. E. J. Keith
/
EDS Nuclear Incorporated 220 Montgomery Street San Francisco, California 94104 Mr. J. E. Houghtaling NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33615 Mr. Jest.e L. Riley, President The Carolina Environmental Study Group 854 Henley Place Charlotte, North Carolina 28207 J. Michael McGarry, III, Esq.
('
Debevoise & Liberman 700 Shorenam Building A'
806 15th Street, H. U.
Washington, D. C.
20005 l
Shelley Blum, Esq.
418 Lau Building 730 East Trade Street
. Charlotte, North Carolina 28202
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NOV 2 1978
- i Hr. William O. Parker, Jr.
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. cc: Robert M. Lazo, Esq., Chr.frman y
Atomic Safety and Licensing Board U. S. fluclear Regulatory Co. mission Washington, D. C.
20555 it l'
Dr. Emeth A. Luebte
, Atomic Safety and Licensing Daard U. S. ?!uclear Regulatory Co.:nission Washingtoh, D. C.
20555 Dr. Cadet H. Hand, Jr.,' Dire: tor
.l Bodega flarine Lab of California
- j P. O. Box 247 I
Bodega Bay, California 94923 I
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