ML20236D947
| ML20236D947 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 03/14/1989 |
| From: | Reeves E Office of Nuclear Reactor Regulation |
| To: | Cottle W SYSTEM ENERGY RESOURCES, INC. |
| References | |
| TAC-71863, NUDOCS 8903230376 | |
| Download: ML20236D947 (5) | |
Text
,
. March '14,1989~
' Docket No. 50-416 DISTRIBUTION hyste PAnderson Nr. W. T. Cottle hRC"PDR LKintner Vice President, Nuclear Operations Local PDR.
0GC System Energy Resources, Inc.
Glainas EJordan Post Office Box 23054 EAdensam BGrines Jackson, Mississippi 39205 LMarsh ACRS(10)
Dear Mr. Cottle:
I
SUBJECT:
GRAND GULF NUCLEAR STATION, UNIT 1 - AUDIT OF-PIPE SUPPORT CALCULATIONS (TAC NO. 71863)
During an audit of pipe support design calculations for.the alternate decay heat removal system (ADHRS) on January 4 and 5, 1989, we found that not all shear stress components caused by torsional loads had been considered.. Froin discussions with System Energy Resources, Inc; (SERI) engineering personnel,.
'l your staff advised us that the method of calculation for supports on other safety-related systems was the same as the method used for the ADHRS.
In response to our January 25, 1989 letter, and the meeting in Rockville, l
l-Maryland on February 14, 1989, SERI's letter dated February 22, 1989 reported l
on its method of analysis used in the design of pipe supports.
The' report I
concluded that the SERI's simplified approach is conservative compared to the method recommended by the American Institute of Steel Construction. We are.
reviewing this information and need additional information regarding the design of supports for safety-related piping systems.
]
On that basis, our staff and consultant, Engineering' Analysis Services, Inc.,
will visit the Grand Gulf Nuclear Station, Unit.1, on March 20 to 24, 1989, for l
the purpose of auditing piping support calculations for safety-related systems.
I An agenda for the visit is enclosed. The proposed visit was discussed with your representatives on March 9 and 13, 1989.
In those discussions, we advised 1
that our visit should have little effect on the refueling outage starting on March 17. Paragraph 4 of the enclosed visit agenda explains the small amount of direct assistance required.
The reporting and/or recordkeeping requirements of this letter affect fewer than 10 respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, 8903230376 890314
/h PDR ADOCK 05000416 1
PNU p
Edward A. Reeves, Acting Director L
Project Directorate II-1 1
Division of Reactor Projects I/II
Enclosure:
Agenda CC:
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1989 Docket No. 50-416 DISTRIBUTION Docket File PAnderson Mr. W. T. Cottle NRC PDR LKintner Vice President, Nuclear Operations Local PDR-OGC System Energy Resources. Inc.
Glainas EJordan Post Office Box 23054 EAdensam BGrines i
LMarsh ACRS (10)
Dear Mr. Cottle:
4
SUBJECT:
GRAND GULF' NUCLEAR STATION, UNIT.1 - AUDIT OF PIPE S PORT CALCULATIONS.(TACNO.71863)
]
During an audit of pipe support design calculations for th alternate decay J
heat removal system (ADHRS) on January 4 and.5, 1989, we ound that not all shear stress components caused by torsional loads had b en considered.
From discussions with System Energy Resources, Inc. (SERI) ngineering personnel,
.j your staff advised us that the method of calculation or supports on other
{
safety-related systems was the same as the method ed for the ADHRS.
J In response to our January 25, 1989 letter, and he meeting in Rockville, Maryland on February 14, 1989, SERI's letter d ed February 22. 1989_ reported on its method of analysis used in the design f pipe supports.
The report concluded that the SERI's. simplified approa is conservative compared to the method recommended by the American Institu of Steel Construction.
We-are reviewing this information and need addit onal information regarding the design of supports for safety-related piping sy tems.
On that basis,'our staff and consulta
, Engineering. Analysis Services, Inc.,
will visit the Grand Gulf Nuclear St ion, Unit 1, on March 20-to 24,1989, for 3
the purpose of auditing piping supp rt calculations for. safety-related systems.
An agenda for the visit is enclose. The proposed visit was' discussed with your representatives on March 9 d 13, 1989.
In.those discussions, we advised that our visit should have littl effect on the refueling outage starting on March 17.
Paragraph 4 of the closed visit agenda explains the.small amount of direct assistance required The reporting and/or record eeping requirements of this.-letter affect fewer than 10 respondents; there ore, OMB clearance is not required under P.L.96-511.
Sincerely.
Edward A. Reeves, Acting Director 1
Project Directorate II-1 1
Division of Reactor Projects I/II
Enclosure:
Agenda cc:
See next page
[GGNS MEMO 71863]
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March 14, 1989 Docket No. 50-416 Mr. W. T. Cottle Vice President, Nuclear Operations System Energy Resources, Inc.
Post Office Box 23054 Jackson Mississippi 39205
Dear Mr. Cottle:
SUBJECT:
GRAND GULF NUCLEAR STATION, UNIT 1 - AUDIT OF PIPE SUPPORT CALCULATIONS ( N NO. 71863)
During an audit of pipe support design calculations for the alternate decay heat removal system (ADHRS). on January 4 and 5,1989, we found that not all shear stress components caused by torsional loads had been considered. From discussions with System Energy Resources, Inc. (SERI) engineering personnel, your staff advised us that the method of calculation for sup) orts on other safety-related systems was the same as the method used for t1e ADHRS.
In response to our January 25, 1989 letter, and the meeting..in Rockville, Maryland on February 14, 1989, SERI's letter dated February 22, 1989 reported on its method of analysis used in the design oi pipe supports. The report concluded that the SERI's simplified approach is conservative compared to the method recomended by the American Institute of Steel Construction. We are reviewing this information and need additional information regarding the design of supports for safety-related piping systems.
On that basis, our staff and consultant, Engineering Analysis Services Inc.,
will visit the Grand Gulf Nuclear Station, Unit 1, on March 20 to 24, 1989, for the purpose of auditing piping support calculations for safety-related systems.
An agenda for the visit is enclosed.
The proposed visit was discussed with your representatives on March 9 and 13, 1989.
In those discussions, we advised that our visit should have little effect on the refueling outage starting on March 17. Paragraph 4 of the enclosed visit agenda explains the small amount of direct assistance required.
The reporting and/or recordkeeping requirements of this letter affect fewer than 10 respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely, Edward A. Reeves, Acting Director Project Directorate II-1 Division of Reactor Projects I/II
Enclosure:
Agenda CC:
-See next page s
l 4
I Mr. W. T. Cottle System Energy Resources, Inc.
Grand Gulf Nuclear Station (GGNS)
CC*
Mr. T. H. Cloninger Mr. C. R. Hutchinson Vice President, Nuclear Engineering GGNS General Manager and Support System Energy Resources, Inc.
System Energy Resourcos, Inc.
Post Office Box 756 P. O. Box 23054 Port Gibson, Mississippi 39150 Jackson, Mississippi 39205 Robert B. McGehee, Esquire The Honorable William J. Guste, Jr.
Wise, Carter, Child, Steen and Attorney Generel Caraway Department of Justice j
P. O. Box 651 State of Louisiana 1
Jackson, Mississippi 39205 Baton Rouge, Luisiana 70804 i
Nicholas S. Reynolds, Esquire Office of the covernor Bishop, Liberman, Cook, Purcell State of Mississippi and Reynolds Jackson, Mississippi 39201 j
1400 L Street, N.W.
l Washington, D.C.
20005-3502 Attorney General Gartin Building Mr. Ralph T. Lally Jackson, Mississippi 39205 i
Manager of Quality Assurance l
Middle South Utilities System Mr. Jack McMillan, Director i
Services, Inc.
Division of Solid Waste Management
{
639 Loyola Avenue, 3rd Floor Mississippi Department of Natural j
New Orleans, Louisiana 70113 Resources j
Post Office Box 10385 i
Mr. John G. Cesare Jackson, Mississippi 39209 l
Director, Nuclear Licensing System Energy Resources, Inc.
Alton B. Cobb, M.D.
I P. O. Box'23054 State Health Officer Jackson, Mississippi 39205 State Board of Health P.O. Box 1700 Mr. C. B. Hogg, Project Manager Jackson, Mississippi 39205 j
Bechtel Power Corporation P. O. Box 2166 President Houston, Texas 77252-2166 Claiborne County Board of Supervisors Port Gibson, Mississippi 39150 Mr. H. O. Christensen i
Senior Resident Inspector Regional Administrator, Region II l
l U.S. Nuclear Regulatory Comission U. S. Nuclear Regulatory Comission Route 2. Box 399 101 Marietta Street j
Port Gibson, Mississippi 39150 Suite 2900 Atlanta, Georgia 30323 i
I
]
ENCLOSURE AGENDA FOR THE PROPOSED VISIT TO THE GRAND GULF NUCLEAR STATION 1.
. Arrival: March 20,1989, 8:30 a.m.
2.
Expected departure: March 24, 1989, 10:00'a.m.
3.
Activities during the visit:
Audit of selected calculations pertinent to pipe supports in 1
the-following systems:
highpressurecoolantsystem(HPCS).
lowpressurecoolantsystem(LPCS) low pressure cooling injection systems (A,8 & C) main steam lines inside containment l
feedwater lines inside containment recirculation of reactor coolant reactor water clean system inside containment The calculation packages in the above systems to be reviewed will be randomly selected and the extent of the audit will depend on such i
factors as: the time available, complexity of the analyses, etc.
An audit of the associated piping analyses may be necessary to i
the extent where it is dictated by the interactions between the i
piping and the pipe supports.
4.
Requested support from SERI a.
entranceandexitmeetings(15-30minuteseach) b.
explanation of the filing system in the record vault to facilitate the retrievability of the documents to be audited c.
two thirty minute meetings per day between the NRC staff and the SERI cognizant' engineer. One meeting in the morning and one in the afternoon will be held to answer any concerns which might be raised during the audit.
4