ML20002C972
| ML20002C972 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 06/15/1964 |
| From: | Case E US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Graves H CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| Shared Package | |
| ML20002C973 | List: |
| References | |
| NUDOCS 8101150507 | |
| Download: ML20002C972 (4) | |
Text
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0RMM EOCKET UNITED STATES
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Docket No. 50 155 June 15, 196h I'onsumers Power Company Change No. 1 212 West Michigan Avenue Jackson, Michigan Attention:
Mr. H. P. Graves s
General Counsel Gentlemen:
The Concumers Power Company has requested, by letter dated March 26, 196L, 47 changes in the Technical Specifications to Operating Licence DPR-6, dtsted May 1, 196h. Two of the items, Item 13 and Item 46, request changes to permit operation of the reactor with natural circulation flow for testing purposes.
Supplemental information re6ardin6 the natural circulation tests was provided by letter dated May 21, 1964, and by TWX dated May 29, 1964.
This request, pertaining only to Items 13 and h6, designa*ed Proposed Change No.1, has been considered pursuant to the provisicns of Section 50.59, 10 CFR 50.-
On the basis of the information submitted in support i
thereof it has been concluded that Change No.1 does not present significant hazards considerations not described or implicit in the hazards summary report and that there is reascnable assurance that the health and safety of the public will not be endangered. A related hazards analysis is attached.
In view of the foregoing, the Technical Specifications to Operating License No. DPR-6 are hereby amended as set forth below:
(1) 5 3.l(b) Reactor Operation; change the minimum recirculation flow rate specification to the following:
Minimum Recirculation Flow Rate, Lb/Hr (Except durin6 pump trip tests or natural circulation tests as ou+11ned in Section 8) 6 x 105 71chis@s~c7 J
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Consumers Power Company June,15, 196h i
(2) 8.2.1 Core Performance and Transient Tests; specification on recirculation flow rate as follows:
' Variable Range Recirculat1on Flow Rate Natural Circulation to-Full 2 Pump Flow (3) Add a new Section 8.2.h-as follows:
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8.2.4 Natural. Circulation Tests
- During Phase II of the R&D Program, selected-tests may be conducted under conditions of natural circulation.
These tests may be performed with the 84-bundle core loadin6 and within the range of variables as specified in Section 8.2.1.
In all cases, any. mode of natural circulation opera-tion shall have been shown analytically.to be within the J
following limits for'the specific flow rate applicable to the given operating conditions.
In addition, as' established during Phase I tests, testin6 will be performed at increasing increments of power to compare analytical calculations with nctual conditions.
8.2.4.1 Operating Limits f
(a) Minimum Overpower Burnout Ratio 1.5 2
Maximum Heat Flux at Overpower, Btu /Hr-Ft 530,000 2
Maximum Steady State Heat Flux, Btu /Hr-Ft 434,000 Maximum Fuel Rod Power at Overpower, Kw/Ft 17.2 Maximum Steady State Fuel Rod Power, Kw/Ft 14.2
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Stability Criterion: Maximum Zero-to-Peak Flux Amplitude, Percent of Average Operating Flux 20 Maximum Steady State Power Level, Mwt
'lhat Per-mitted By Other Opera-ting Limits Maximum Reactor Pressure During Power Operation, psig 1h85 Such tests shall be performed prior to September 1, 1964.
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(b) Power vs Minimum Permissible Natural Circulation Flow Distribution to assure that the minimum burnout ratio is 1 5 or Original greater for 84 Fuel Assembly Core.
Document Room ormal Power Minimum Flow Permitted Predicted Flov
'upplemental 6
lbs/Hrx106 R&PRSB Reading MW(t) lbs/Hr x 10 DRL Reading (5 )
90 1.7
4.2 Originator
JShea 110 2.3 4.4 130 3.2 4.6 bec:
H. J. McAlduff, 156 5.0**
4.8 (E00 E. G. Case (c) The maximum operating level vill be that which H. Shapar, OGC corresponds to 100% where the calculated limiting L. Kornblith, CO (2ponditions are considered as 122% overpower.
F._ Travelstead (d[ ' Set Point changes in plant instrumentation are es-E. Trensnel H. Steele sentially only the picosmmeter set points which will G. Fage be adjusted to be compatible with the new operating R. Huard power level dictated by any of the above operating limitations.
8.2.4.2 General Procedure Phase II natural circulation tests will begin from a normal forced circulation mode in the following general steps:
a.
Trip both recirculation pumps from an initial steady operating condition, not to exceed 157 Mwt.
b.
After power coast-down has settled out, increase power in approximately 20 Mwt steps, while measuring power level, flow rate and flux noise amplitude to confirm observance of specified operating limits.
c.
At selected operating points, perform Phase II tests such as rod oscillator tests, d.
Upon termination of natural circulation tests, restore forced circulation mode after reducing power level to that obtained in Step b. above after tripping pumps.
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- Maximumpermissiblenaturalcirculaticgflowforstableoperation(no oscillations) is greater than 5.6 x 10 lbs/hr at 155 Mv(t).
Sincerely yours, Original signed by E.C.C~~
une Director Division of Reactor Licensing
Enclosure:
EgSB:DRL B:Dal. OGC DRL Hazards Analysis i] k.
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3 Consurmre Power Company June 15, 1964
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(b) Power. vs Minimum Permiselble Natural Circulation Flow to assure that the minimum burnout ratio is 1 5 or greater for 84 Fuel Assembly Core.
Power Mininum Flow Permitted Predicted Flow 6
lbs/Hrx106 l
MW(t) lbs/Hrx10 90 1.7 4.2 110 23 4.4 130' 32 4.6 156 5 0**
4.8 (c) The maximum operating level vill be that which
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correspor.Js to 100% where the calculated limiting
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conditions are considered as 122% overpower.
' (d ) Set' Point changes in plant instrumentation are es-sentially only the picoammeter set points which will i
be adjusted to be compatible with the new operating power level dictated by any of the above operating limitations.
8.2.h.2 General Procedure Phase II natural circulation. tests will begin from a normal forced circulation mode in the following general steps:
Trip both recirculation pumps from an initial steady a.
operating condition, not to exceed 157 Mwt.
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b.
After power coast-down has settled out, increase power in approximately 20 Mwt steps, while measuring power level, flow rate and flux noise amplitude to confirm observance of specified operating limits.
2 c.
At selected operating points, perfonn Phase II tests such as rod oscillator tests.
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d.
Upon termination of natural circulation tests, restore forced circulation mode after reducing power level to that obtained in Step b. above after trinping pumps.
- Maximumpermissiblenaturalcirculatiogflowforstableoperation-(no r
oscillations) is greater than 5.6 x 10 lbs/hrat155Mw(t).
Si ly yo s,
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Director Division of Reactor Licensing
Enclosure:
Hazards Analysis
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