ML20002E015
| ML20002E015 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 02/09/1971 |
| From: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Walke G CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML20002E016 | List: |
| References | |
| NUDOCS 8101260107 | |
| Download: ML20002E015 (4) | |
Text
...
l UNITED STATES g+
k ATOMIC ENERGY COMMISSION 77y 7.7s.
WASHINGTON. D.C. 20545 February 9, 1971 Docket No. 50-155 Consumers Power Company ATTN:
Mr. Gerald J. Walke Nuclear Fuel Management Administrator 212 West Michigan Avenue Jackson, Michigan 49201 Change No. 22 License No. DPR-6 Gentlemen:
Your Proposed 01ange No. 23 dated December 18, 1970, requested changes to to the Technical Specifications of Facility License No. DPR-o permit operation of the Big Rock Point Nuclear Reactor with an instrumented fuel rod inserted in the reactor core. The fuel rod would be instrumented with thermocouples inside the cladding and the rod installed in a modified Reload-F fuel bundle to measure clad temper-etures for analysis of crud laydown rates and the associated heat transfer phenomena. We have redesignated your request Proposed Change N o '. 22.
W agree that the nuclear and thermal-hydraulic characteristics of the instrumented Reload-F bundle will be essentially the same as those for the standard Reload-F bundles previously approved.
Consequently, we have concluded that installation of an instrumented fuel rod in a modified Reload-F fuel bundle will not change the nuclear and thermal performance characteristics of the reactor significantly nor compromise the primary reactor system integrity, and that the change does not present signifi-cant hazards considerations not described or implicit in the safety analysis report. There is reasonable assurance that the health and safety of the public will not be endangered by operation of the Big Rock Point Nuclear Reactor with the instrumented fuel rod in the core in the aanner proposed.
Accordingly, pursuant to Section 50.59 of 10 CFR Part 50, the Technical Specifications of Facility License No. DPR-6 are hereby changed as
-indicated in Attachment A to this letter.
Sincerely,
(
y /d Peter A. Morris, Director Division of Reactor Licensing
Enclosure:
Attachment A - Changes to Technical Specifications cc: George F. Trewbridge, Esquire
2 i
ATTACHMENT A CHANGE NO. 22 TO TECHNICAL SPECIFICATIONS FACILITY LICENSE NO. DPR-6 CONSUMERS POWER COMPANY DOCKET NO.- 50-155 1.
In Section 8.1, change the first paragraph to read as follows:
"The general dimensions and configuration of the developmental fuel designs shall be as shown in Figures 8.1 through 8.5.
The principal design f eatures shall be substantially those shown in Table 8.1."
2.
In Section 8.1, add Figure 8.5, Big Rock Point F Fuel with Instru-mented Fuel Rod.
3.
Add a new Sect' 1.3 to ress:
"8.1.3 Instrumented Fuel Bundle One Reload-F fuel bundle may be modified to include an instrumented fuel rod.
The instrumented fuel rod shall incorporate Reload-F design and fabrication features except that provision shall be made to locate thermo-couples in the fuel rod and to extend thermocouple leads fr6m the rod to a penetration seal in the reactor pressure vessel head.
Nuclear and thermal-hydraulic characteristics of the instrumented fuel bundle shall be the same as for Reload-F bundles."
4.
In Section 8, add the actached column and footnotes to Table 8.1.
Section 8 - Table 8.1. (Column and footnotes to be added):
" Reload (F) With Instrumented Fuel Rod General Geometry 9x9 Rod Pitch, Inch 0 707 Standard Fuel Rods per Bundle 69 Special Fuel Rods per Bundle 12(O)
Spr1 ers per Bundle 3
Fue Rod Cladding Vaterial Zr-2 Standard Rod Tube Wall, Inch O.0h0 Special Rod 7bbe Wall, Inch 0.0h0 and 0.060(9)
Fuel Rods Standard Rod Diameter, Inch 0 5625 Special Rod Diameter, Inch 0 5625 Fuel Stacked Density, Percent Theoretical 94 Pellet g)
Active Fuel Length, Inches - Standard Rod TO
- Special Rod 64 9 Central 68.4 Instrumented Fill Gas Helium
(
Same as E-G fuel except that the bundle contains an instrumented fuel rod.
(9 Instrumented fuel rod is clad with tubing having O.060-inch vall. Tubing contains axial grooves on inner surface. The depth of the grooves is 0.020 inch."
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