ML20002D874
| ML20002D874 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 12/17/1970 |
| From: | Walke G, Wall H CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Morris P, Skovholt D US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8101230249 | |
| Download: ML20002D874 (6) | |
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L Consumers PoWCi r
Company cen.c.i omc..: 2i2 w. i u.chigan Avenue. Jackson. Michigr.n 49201
- Area Code 517 780-OSSO December 17, 1970 Regu!nier; Fi!e Cy.
Dr. P. A. Morris, Director Pa: Docket 50-155 Division of Reactor Licensing DPR-6 ZEK United States Atomic Energy Proposed Tech Spec Commission Change 22 Washington, DC 205h5
Dear Dr. Morris:
Attention: Mr. D. J. Skovolt Transmitted herewith are three (3) executed and thirty-seven (37) conformed copies of a request for a change to the Tech-nical Specifications of License DPR-6. Docket No 50-155, issued to Consumers Power Comoany on May 1, 1964 for the Big Rock Point Nuclear Plant.
This proposed change (No 22) will enable Consumers Power Company to insert into the reactor at Big Rock Point a fuel design designated as " Type J-1."
This fuel has been designed and fabricated by Jersey Nuclear Company, a wholly owned subsidiary of Standard Oil Company (New Jersey). This fuel design is essentially identical to the Reload "E-G" fuel, currently the standard Big Rock Point reload fuel. The mino. differences represent improvements in the design.
It is our intention to insert "J-1" fuel into the Big Rock Point R<.etor during our next refueling cutage which is currently schedul d for February 1971. We would, therefore, be most appre-ciative of an expeditious handling of this Request for a Technical Specifications Change so that we might receive approval before Janutry 15, 1971.
Yours very truly,
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GJW/dmb Nuclear Fuel Management Administrator octw
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CONSUMERS POWER COMPANY am:v: s,... -... g gy, Docket No 50-155
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Request for Change to the Technical Specifications Change No 22 License No DPR-6 For the reasons hereinafter set forth, the following charges to the Technical Specifications of License DPR-6 issued'to Consumers
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Power Company on May'1,1964 for the Big Rock Point Nuclear Plant are J
requested:
I.
Section-5 A.
In Section 515, change (c) to read as follows:
"(c) Fuel Bundles The general design and configuraticn of the twelve types of fuel bundles shall be as shown in Figures 5 2 through 5.6.
The e.esign and configuration of the instrumented fuel bundle is shown in Figure 5 13 Principal design features shall he as on Table 51."
B.
In Section 515, add Figure 5.6, Big Rock Point Type "J-1" fuel.
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C.
In Section 515, add the attached column and footnote to Table 5 1.
D.
In Section 5 2, add "J-1" to Column 2 heading of Table 5 2.
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9' Section 5.1 5 - Table 51 Column-and footnote to be added.
J General J-1 Geometry 9x9 Rod Pitch, Inch 0 707 Standard Fuel Rods per
.Bandle 71 Special Fuel Rods per 13(6)
Bundle Spacers per Bundle 3
~ Fuel Rod Cladding Material Zr-2 4
Standard Rod Tube Wall, Inch
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Special Rod Tube Wall, Inch
- 0. 0h0 FuelRo.{s i
Standard Rod Diameter, Inch 0 5625 Special Rod Diameter, Inch 0 5625 Fuel Stacked Density, 91(7)
Percent Theoretical Active Fuel Length, Inches Standard Rod 68 Special Ik>d 62.2 Cent ral Fill Gas Helium.'95%
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(6)This includes: 4 gadolinia containing rods, one of which is re-removable, k removable cobalt bearing corner rods, 5 removable
_. rods and one central spacer capture rod.
(I} Pellets are dished 3% of undished volume.
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3 II.
Discussion '- Type "J-1" Fuel A.. Fuel Description
- The Type "J-1" fuel is almost identical to the Reload "E-G" and "F"
fuels.
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Like the "E" and "E-G" fuels, the "J-1" fuel is a 9 x 9 array of fuel rods consisting of enriched uranium dioxide pellets contained within Zircaloy-2 tubes. Gadolinium oxide blended with UO 18 2
utilized as a burnable poison in four of the fuel rods to. enable the fuel to achieve an nyerage burnup of 20,000 mwd /T while meeting control rod shutdown margin requirements. The "J-1" fuel has been designed and fabricated by Jersey Nuclear Company, a fully owned subsidiary of Standard Oil Company (New Jersey).
The primary design variation between the "J-1" fuel and the currently licensed fuels ("E" and "E-G") is the addition of a short diffuser to the inlet tie plate to improve the flow distri-bution at the entrance of the bundle (see Figure 5 6). Although the diffuser shortens the active fuel length of the "J-1" fuel bundles by about two inches as compared to the existing fuels, its effect on the power generation of this bundle and bundles
- adjacent to it is negligible.
The nuclear design of the "J-1" fuel bundles is directly com-parable with the Reload "E-G" fuel. The average bundle fuel enrichment for the "J-1" fuel is 3 53 w/o U-235 which compares with 3 52 w/o U-235 for the "E-G" fuel. The "J-1" fuel bundle power distribution and all other nuclear characteristics are directly comparable with the Reload "E-G" fuel.
III. Hazards Considerations All present limits on control rod worth, -heat flux, center melting, fuel temperature and critical heat flux ratio will be observed, end operation of the reactor will be with';. these limits. In the R&D Program at Big Rock Point, it has been shown that major differences in mechanical design between fuel bundles have little or no effect with repsect to hazards considerations. The above detailed design and l
manufacturing changes have not altered the resvits of the hazards analyses.
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. Based upon this, we have concluded that the use of "J-1" fuel assemblies-in the Big Rock Point Nuclear Plant does not present a charge in the i
hazards. considerations described or implicit ~ in the Final' Hazards Summary
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CONSUMERS POWER C0hTAhT
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Senior Vice President Date: December 17, 1970 Sworn and subscribed to before me this 17th day of December ~1970.
\\en 0s C % M sul J
Notary Public, Jackson County, Michigan My commission expires January 15, 1972 I
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