ML19345A009
| ML19345A009 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/28/1980 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8009150527 | |
| Download: ML19345A009 (3) | |
Text
.Y,
TEMA 1%,
UNITED STATES y
g NUCLEAR REGULATORY COMMISSION C
WASHINGTON D. C. 20555
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August 28,'1980 t
Docket Nos. 50-327 g
and 50-328 g
Mr. H. G. Parris Manager of Power Tennessee Valley Authority 500 A Chestnut Street, Tower II Chattanooga, Tennessee 37401
Dear Mr. Parris:
SUBJECT:
SEQUOYAH UNIT 1 - INTERIM DISTRIBUTED IGNITION SYSTEM (IDIS)
In your letter of July 17, 1980, you proposed the installation of an interim distributed ignition system (IDIS) for the Sequoyah Nuclear Plant, Unit No. 1.
We understand you plan to have the IDIS in place and ready for operation by September 15, 1980. The associated date for E_
your submittal of a safety analysis report was August 15, 1980.
c We received your two letter reports, dated August 14, 1980, which j
constitute your safety analysis of the proposed igniter system. We found that these letter reports did not adequately address the topics that need attention in a safety analysis of IDIS. Attached is the I
request for additional information which was provided to your staff i
on an infomal basis, u
t At that time, we also requested draft reports and a draft user's manual 5
describing the CLASIX computer code (which analyzes the consequences of j
hydrogen combustion). We have noted on the attachment the estimated k
submittal dates which you telecopied to our office. We will schedule
(
our review in accordance with these dates; however, we urge you to L
submit all information as expeditiously as possible.
n Sincerely, I
7 c
chwencer,., Chief j
Licensing Branch #2 C
Division of Licensing L
Enclosure:
As stated cc w/ encl:
See next page seceu 2
7-j.
Mr. H.
G.~ Parris
' August 28, 1980 Manager of Power.
Tennessee Valley Authority 500A Chestnut Street Tower II Chattanooga Tennessee 37401 cc: Herbert S. Sanger, Jr., Esq.
General Counsel Tennessee Valley Authority 400 Comerce Avenue E llB 33 Knoxville, Tennessee 37902 Mr. H. N. Culver Tennessee Valley Authority l
400 Comerce Avenue, 249A HBB Knoxville, Tennessee 37902 Mr. Bob Faas Westinghouse ~ Electric Corporation Post Office Box 355 Pittsburgh, Pennsylvania 15230 g
Mr. Mark Burzynski
-9 Tennessee Valley Authority 400 Chestnut Street Tower II Chattanooga, Tennessee' 37401 I
Mr. J. F. Cox Tennessee Valley Autyority i
400 Comerce Avenue, W10Cl31C Knoxville, Tennessee 37902 i
Resident Inspector /Sequoyah NPS c/o' U.S.. Nuclear Regulatory Comission 9
Post Office Box 699 h
Hixson, Tennessee 37343
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ENCLOSURE TOPICS FOR INTERIM PROGRAM REVIEW Estimated Submittal Date Item 1.
08/27/80 Location and Number of igniters (Discuss why the IDIS is' adequate) 2.
08/27/80 H2 Monitoring and mixing (Discuss why the current provisions are adequate for i
interim operation with the IDIS) 3.
09/12/80 Ability of ingiters to function in turbulent, flowing atmosphere
?
08/27/80 Engineering Rationale l
l 4.
08/27/80 Procedures and strategy for igniter operation.
(Discuss the criteria to be used in evaluating igniter e
strategy, e.g., will igniters be turned on for a signal derived from SI, containment high pressure, pressurizer e
pressure) 5.
09/02/80 Analysis models CLASIX 1
a.
Solution Scheme b.
Containment Modeling c.
Input parameters
[
t
- 6. 09/08/80 Analysis results.
a.
Mixing of constituents l
b.
Sensitivity studies I
7.
09/03/80 Effects of local detonations or turbulent deflagrations, i
8.
09/03/80 Survival of essential equipment in event of H2 burning Eng. Judgment and plan 09/12/80 Westinghouse Tests 9.
08/28/80 Procedures and results from interim testing of igniters.
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