ML19289C669
| ML19289C669 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/15/1979 |
| From: | Gilleland J TENNESSEE VALLEY AUTHORITY |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7901220085 | |
| Download: ML19289C669 (3) | |
Text
h TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENN ESSEE 37401 500C Chestnut Street Tovar II JM 151979 Director of Nuclear Reactor Regulation Attention:
Mr. Thomas A. Ippolito, Chief Branch No. 3 Division of Operating Reactors f
U.S. Nuclear Regulatory Commission Washington, DC 20555 Dear Mr. Ippolito In the Matter of the
)
Docket No. 50-296 Tennessee Valley Authority
)
This is in regard to your letter of November 18, 1978, to N. B. Hughes which issued Amendment No. 18 to operating license No. DPR-68 for Browns Ferry unit 3 and my letter to you of November 30, 1978, concerning MCPR operating limits. After a further review of the data available and a meeting with members of your staff on January 3, 1979, TVA has car cladad that an additional conservatism should be added to the MCPR operating limit now in effect on Browns Ferry unit 3.
This conservatism is is result of concerns that the REDY transient code is deficient in conservatively predicting pressurization transients.
Enclosed are requested changes to the Browns Ferry Nuclear Plant unit 3 technical specifications which will result in the following limits.
The MCPR operating limit from the beginning of cycle 2 to the end of cycle 2 minus 2000 MRd/T is 1.24 for 8x8 fuel and 1.21 for 8x8R fuel; and the limit from the end of cycle 2 minus 2000 mwd /T to the end of cycle 2 is 1.24 for 8x8 fuel and 1.24 for 8x3R fuel.
This proposed amendment is in response to a condition imposed by NRC on Amendment No. 18 to operating license No. DPR-68; therefore, we believe this proposed amdment is exempt fro:n ths license fee requirements of 10 CFR Part 170.22.
Very truly yours, h c h ty c J. E. Gilleland Assistant Ifanager of Power Subscribed and sworn to before me this /5'l ay of ), <,, a e u.
1979.
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/ 4 w.. M ?/. & o u m NotarfPublic g
My Commission Expires 4
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Enclosures cc See page 2 79012200 6 am e, o,% cm
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Mr. Thomas A. Ippolito
-j 'n > ; 15 1979 cc (Enclosures):
Mr. Charlas R. Christopher Chairman, Limestona County Comission P.O. Box 188 Athens, Alabama 35611 Dr. Ira L. Myers State Health Officer Stata Department of Tublic Health Stata Office Building Montgomery, Alabama 36104
- 5 ENCLOSURE i
LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 1.5 COKE AND COtrTAltlMEttr
- 4. 5 CORE ANLSQEM_N5EE COOLRiG CooLIt G syq sis _gtis and corr esponding action shall continue until reactor operation is within the. prescribed limits.
K.
Minimum Critical Power Ra_tio (MCPR)
K.
Minimum Critical Power The IfCPR operating limit from Ratio (MCPp) the beginning of cycle 2 to the end of cycle 2 minus 2000 MC PP shall be determined FMd/T is 1.24for 8X8 fuel and d'ilY d"fi"9 #**Ct # P ***
1.21 for 8X8R fuel; the limit operation at 2 251 rated from the end of cycle 2 minus t her ma l power and 2000 FMd/T to the end of cycle following any change in power level or 2 is 1.24 for 8X8 fuel and di st ri bu tion that would 1.24 for 8X8R fuel. These limits cause perati n with a apply to steady state power limiting control rod operation at rated power and pattern as described in the bases f or flow.
For core flows other specification 3.3.
than rated, the 11CPR shall be greater than the above limits times Kr.
Er is the value shown in Figure 3.5.2.
If at time during operation, mw it is determined by normal surveillance that the limiting value for MCPR is being exceeded, action shall be initiated within 15 minuten to restore operation to within the preocribed limits.
If the st ea dy stat e MCPR is not returned to within the prencribed limits within two (2) hours, the reactor shall be brought to the Cold Shutdown condition within M hours.
Surveillanco an1 cori esponding act ion shall continue until reactor operation is within the p r et;cr i b n:] 11 rn a t n.
L.
Deportinq B eq1ti r ements It any of the limiting va hes iden t i f a nd in 167 Specifications 3.5.I, J,
q or K are exceeded and the specified remedtal act i on 10 taken, th" event shall Amendment No.18 be looged and reported in a 30-d.sy writ ten r e por t.