ML20003E640
| ML20003E640 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/01/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| TVA-SNP-TS-8, NUDOCS 8104070454 | |
| Download: ML20003E640 (11) | |
Text
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400 Chestnut Street Tower II April 1, 1981 k--
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D Director of Nuclear Reactor Regulation
-i'9 Attention:
Mr. A. Schwencer, Chief
,(,.- _._M Licensing Branch No. 2
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Division of Licensing U.S. Nuclear Regulatory Commission WNhington, DC 20555
Dear Mr. Schwencer:
In the Matter of
) Docket No. 50-327 Tennessee Valley Authority
)
My letter to you dated January 30, 1981, committed TVA to revise the containment /temperatura analysis provided in TVA's Core Degradation Report Volume 2 to reflect the reduced ice mass of 2,221,992 pounds. We have had the original Sequoyah Nuclear Plant base case CLASIX analysis rerun with the reduced ice mass. The results of the two runs are compared in the enclosed table. As expected, the results are similar except for the reduced ice mass. Also enclosed is a copy of the temperature and pressure plots for the reduced ice mass case.
If you have any questions, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safety Sworn to and subscribed before me day of 1981 this
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e Notary Public 2 ;
My Commission Expires Enclosures
_.810 40.70 %f k
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ENCLOSURE SEQUOYAH NUCLEAR PLANT REVISED CONTAINMENT / TEMPERATURE ANALYSIS REFLECTING NEW ICE MASS e
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CLASIX ANALYSIS ir TVA SEQUOYAH - REDUCED TECH SPEC ICE CASE COMPARISON
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T ORIGINAL NEW TECH W.P BASE SPEC ICE CASE CASE (JV900)
- Burns LC 9
9 IC 1
1 UC 0
0 MagnitudeofBurns(Lbm)LC s100 s100 IC 37 45 UC Total H Burned (Lbm) s900 s950 2
H Remaining (Lbm) s650 s600 2
Peak Temp (OF)LC 2200 2100 IC 1200 1350 UC 150 155 3
Peak Pressure (PSIA) LC 26.5 26.8 IC 28.5 28.2 l
UC 28.5 28.5 TIME TIME ICE MASS (LBM)
DURING DURING TRANSIENT CLASIX ORIGINAL BASE NEW TECH SPEC (SEC)
(SEC)
CASE ICE CASE 6
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- 2.45 x 10
- 2.22 x 10 0
6 3480 0
1.67 x 10 1.44 x 10 5
5 7080 3600 3.05 x 10 1.19 x 10 6
6 l
Ice Melted During CLASIX 1.37 x 10 1.32 x 10
- Note:
LOTIC portion of analysis.(0 to 3480 sec) was not rerun; ice mass was reduced by.23 x 106 lbm at the beginning of the new CLASIX run.
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