ML18016A988
| ML18016A988 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 06/16/1999 |
| From: | Richard Laufer NRC (Affiliation Not Assigned) |
| To: | Scarola J CAROLINA POWER & LIGHT CO. |
| References | |
| TAC-MA4432, NUDOCS 9906210180 | |
| Download: ML18016A988 (9) | |
Text
Mr. James Scarola, Vice ident June 16, ~
Shearon Harris Nuclear Power Plant Carolina Power 8 Light Company Post Office Box 165, Mail Code: Zone'1 New Hill, North Carolina,27562-0165 f
SUBJECT:
REQUEST FOR ADDITIONALINFORMATIONREGARDING AMENDMENT REQUEST TO INCREASE FUEL STORAGE CAPACITY-SHEARON HARRIS NUCLEAR POWER PLANT (TAC NO. MA4432)
Dear Mr. Scarola:
By letter dated December 23, 1998, you requested a license amendment to revise Shearon Harris Nuclear Power Plant Technical Specification (TS) 5.6, "Fuel Storage," to increase the spent fuel storage capacity by adding rack modules to pools 'C'nd
'D.'uring the course of its review, the NRC staff has determined that additional information is necessary to complete its review. The enclosed request for additional information was discussed with your Licensing staff on June 11, 1999. A mutually agreeable target date of July 23, 1999, for your response was established.
Ifcircumstances result in the need to revise the target date, please call me at the earliest opportunity.
Sincerely, Original signed hy:
Docket No. 50-400
Enclosure:
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UNITED STATE S NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 205554001 June 16, 1999 Mr. James Scarola, Vice President Shearon Harris Nuclear Power Plant Carolina Power 8 Light Company Post Office Box 165, Mail Code: Zone 1
New Hill, North Carolina 27562-0165
SUBJECT:
REQUEST FOR ADDITIONALINFORMATIONREGARDING AMENDMENT REQUEST TO INCREASE FUEL STORAGE CAPACITY-SHEARON HARRIS NUCLEAR POWER PLANT (TAC NO. MA4432)
Dear Mr. Scarola:
By letter dated December 23, 1998, you requested a license amendment to revise Shearon Harris Nuclear Power Plant Technical Specification (TS) 5.6, "Fuel Storage," to increase the spent fuel storage capacity by adding rack modules to pools 'C'nd
'D.'uring the course of its review, the NRC staff has determined that additional information is necessary to complete its review. The enclosed request for additional information was discussed with your Licensing staff on June 11, 1999. A mutually agreeable target date of July 23, 1999, for your response was established.
Ifcircumstances result in the need to revise the target date, please call me at the earliest opportunity.
Sincerely, Richard J. Laufer, Project Manager, Section 2 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-400
Enclosure:
As stated ccw/encl: See next page
REQUEST FOR ADDITIONALINFORMATION With respect to the dynamic fluid-structure interaction analysis using the computer code, DYNARACK,in the Reference, provide the following:
a)
Explain how the simple stick model used in the dynamic analyses can represent accurately and realistically the actual highly-complicated nonlinear hydrodynamic fluid-rack structure interactions and behavior of the fuel assemblies and the'ox-type rack structures.
Discuss whether or not a finite element (FE) model with 3-D plate, beam and fluid elements together with appropriate constitutive relationships would be a more realistic, accurate approach to analyze the fluid-structure interactions in contrast to the stick model.
b)
Provide the results of any prototype or experimental study that verifies the correct or adequate simulation of the fluid coupling utilized in the numerical analyses for the fuel assemblies, racks and walls. If there is no such experimental study available, provide justification that the current level of the DYNARACKcode verification is adequate for engineering application without further experimental verification work.
Demonstrate that the artificial seismic time histories used in the analyses satisfy the power spectral density (PSD) requirement of Standard Review Plan (SRP) Section 3.7.1.
3.
Provide the physical dimensions of the racks, gaps between the racks, and the gaps between the racks and the walls.
4.
Your analysis results show that there are rack-to-pool wall and rack-to-rack impacts.
Indicate whether you are planning to install a support system to minimize displacement and impact force between the rack-to-pool wall and rack-to-rack.
With respect to the spent fuel pool (SFP) structural analysis using the STARDYNE computer code presented in the
Reference:
a)
Provide a plan view of the SFP and physical dimensions of the reinforced concrete slab and walls, liner plate and liner anchorage.
b)
Provide the mesh used in the analysis.
c)
Describe the boundary conditions used, and indicate them in the mesh.
d)
Provide the material properties used in the analysis.
e)
Describe the applied loading conditions including the magnitudes, and indicate their locations in the mesh.
Enclosure
f)
Explain how the interface between the liner and concrete slab is modeled, and also, how the liner anchors are modeled.
Provide the basis for using such modeling with respect to how they accurately represent the real structural behavior.
g)
Provide the calculated governing factors of safety in a tabular form for the axial, shear, bending and combined stress conditions.
.6.
What is the maximum bulk pool temperature at a full core off-load during a refueling outage?
If the temperature exceeds 150 'F, provide the following:
a)
ACI Code 349 limits the concrete temperature to 150 F for normal operation or any other long-term period.
Provide technical justifications for exceeding 150 F.
b)
Describe the details of the SFP structural analysis including the material properties (i.e.; modulus of elasticity, shear modulus, Poisson's ratio, yield stress and strain, ultimate stress and strain, compressive strength) used in the analysis for the reinforced concrete slab and walls, and liner plate, welds and anchorages in the analysis.
7.
Discuss the quality assurance and inspection programs to preclude installation of any irregular or distorted racks, and to confirm the actual fuel rack gap configurations with respect to the gaps assumed in the DYNARACKanalyses after installation of the racks.
8.
Describe the plan and procedure for the post operating basis earthquake inspection of fuel rack gaps and configurations.
9.
Describe how the liner plates are attached to the channels embedded in the concrete slab.
10.
Provide the locations of the leak chase systems with respect to the locations of the racks and pedestals.
11.
Describe the method of leak detection in the fuel pool structure.
How are leaks monitored?
Is there any existing leakage?
Reference:
Letter, Carolina Power 8 Light Company to U.S. NRC, "Shearon Harris Nuclear Power Plant, Docket No. 50-400/License No. NPF-63, Request for License Amendment Spent Fuel Storage, dated December 23, 1998."
Mr. James Scarola Carolina Power 8 Light Company Shearon Harris Nuclear Power Plant Unit 1 CC:
Mr. William D. Johnson Vice President and Corporate Secretary Carolina Power & Light Company Post Office Box 1551 Raleigh, North Carolina 27602 Resident Inspector/Harris NPS, c/o U.S. Nuclear Regulatory Commission 5421 Shearon Harris Road New Hill, North Carolina 27562-9998 Ms. Karen E. Long Assistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602 Public Service Commis;ion State of South Carolina Post Office Drawer Columbia, South Carolina 29211 Mr. Mel Fry, Director Division ofRadiation Protection N.C. Department of Environment and Natural Resources 3825 Barrett Dr.
Raleigh, North Carolina 27609-7721 Mr. Terry C. Morton Manager Performance Evaluation and Regulatory Affairs CPB 7 Carolina Power 8 Light Company Post Office Box 1551 Raleigh, North Carolina 27602-1551 Mr. Bo Clark Plant General Manager - Harris Plant Carolina Power & Light Company Shearon Harris Nuclear Power Plant P.O. Box 165 New Hill, North Carolina 27562-0165 Mr..John H. O'eill, Jr.
Shaw, Pittman, Potts &Trowbridge 2300 N Street, NW.
Washington, DC 20037-1128 Mr. Chris L. Burton Director of Site Operations
.Carolina Power 8 Light Company Shearon Harris Nuclear Power Plant Post Office Box 165, MC: Zone 1 New Hill, North Carolina 27562-0165 Mr. Robert P. Gruber Executive Director Public Staff NCUC Post Office Box 29520 Raleigh, North Carolina 27626 Chairman of the North Carolina Utilities Commission Post Office Box 29510 Raleigh, North Carolina 27626-0510 Mr. Vernon Malone, Chairman Board of County Commissioners of Wake County P.
O. Box 550 Raleigh, North Carolina 27602 Mr. Richard H. Givens, Chairman Board of County Commissioners of Chatham County P. O. Box 87 Pittsboro, North Carolina 27312 Ms. Donna B. Alexander, Manager Regulatory Affairs Carolina Power 8 Light Company Shearon Harris Nuclear Power Plant P.O. Box 165, Mail Zone 1 New Hill, NC 27562-0165
'r. Johnny H. Eads, Supervisor Licensing/Regulatory Programs Carolina Power 8 Light Company Shearon Harris Nuclear Power Plant P. O. Box 165, Mail Zone 1
New Hill, NC 27562-0165 m r Ms. Diane Curran Harmon, Curran, Spielberg, and Eisenberg, L.L.P.
1726 M Street NW., Suite 600 Washington, DC 20036
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