ML18026B096
| ML18026B096 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 07/12/1984 |
| From: | Kammer D TENNESSEE VALLEY AUTHORITY |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.K.3.28, TASK-TM NUDOCS 8407170351 | |
| Download: ML18026B096 (6) | |
Text
REGULATORY iNFORMATION DISTRIBUTION SY M (RIDS)
ACCESSION NBR:8407170351 DOC ~ DATE: 84 FACIL:50-259 Browns Ferry Nuclear Power 50-260 Browns Ferry Nuclear Power 50-296 Browns Ferry Nuclear Power
'AUTH,NAME AUTHOR AFFILIATION KAMMERtD>>S>>
Tennessee Valley Autho RECIP,NAME RECIPIENT AFFILIATION DENTONiH,R>>
Office. of Nuclear Reac
/07/12 NOTARIZED; YES, DOCKET Stations Unit 1i Tennessee 05000259 Stationr Unit 2i Tennessee 05000260 Stationi Unit 3, Tennessee 05000296 rity tor Regulationr Director SUBJECT!
For wards response to DG Eisenhvt 840529 request for addi info r:e Multi<<Plant Action F 55 concerning NUREG-0737@,
Item II'>>3,28'Qualification of Automatic Depressurization Sys Accumulators>>
DISTRIBUTI N CODE:
ao<6S COPIES RECEIVED;LTR ENCL SIZE:
o TITLE:
OR Submit.tal>>
TMI Action Plan Rgmt NUREG-0737 L
NUREG 0660 NOTES:NMSS/FCAF 1cy,,1cy NMSS/FCAF/Ph1, 05000259 OL;06/26/73 NMSS/FCAF 1cy ~
1cy NMSS/FCAF/PM'5000260 OL:06/28/7e NMSS/FCAF 1cy.
1cy NMSS/FCAF/Pf1 ~
OL;,07/02/76 RECIP IENT ID CODE/NAtlE~
NRR ORB2 BC 01 INTERNAL: ELD/HOSE IE/DEPER/EPB NRR PAULSONeN ~
NRR/DL DIR 14 NRR/DSI/ADRS 27 NRR/DS I/ASB NRR/DST DIR 30 RGN2 COPIES LTTR ENCL 7
7 1
0 3
1 1
1 1
1 1
1 1
1 1
1 1
RECIPIENT ID CODE/NAME IE/DEPER DIR 33 IE/DEPER/IRB NRR/DHFS DEPY29 NRR/DL/ORAB 18 NRR/DS I/AEB RAB REG FIL 04 COPIES LTTR ENCL 1
1 1
'1 1
1 3
3 1
1 1
1 1
1 EXTERNAL; ACRS NRC PDR NTIS NOTES:
3u 02 10 10 1
1 1
1 LPDR NSIC 03 05 TOTAL NUMBER OF COPIES REQUIRE'D ~
LTTR 02 ENCL R1
C I M' c
<<M>>
11 '
)I r
M v>>
MM I
% c
,f N,K, M
I t,.t I
N i
h If>>fl'I II' fg<<<<r g
l.
I N
r g'1 I<<7'7 lg>I,"
I NN Il
=
M ll f q
"f I f
I
- I
" Nla'
~
"NM i<<,
f M 'I M<<M 7 tt gp
>> I f M, '>> I <<M 'l I f
<<rf>
tc ~ I f -rff I I
> k r f f I Lfv l MI<< ~ r v M<<
~ e,'lc<<tvrfM'I I'r
~
'7
~
N
<<3 'I
~ <<t "I'i 'I*7<<
M" C Isl I ~
j Mr
~
7 M>>3
<< fr Iitp
<<col
<<f I ltffrf<<" l 1
~ IN I<<tt IMN I I I
1 M V
'1MN f
)
INN.0 fN, l<<
I tNNc.c' 7
N N<<lrC I I "NMM,M "
I NMI>>
f I<<i pl' NI' I I'4
<<X tI
)< li I
TENNESSEE VALLEYAUTHORITY CHATTANOOGA. TENNESSEE 3'7401 400 Chestnut Street Tower II July 12, 1984 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear Mr. Denton:
In the Matter of the Tennessee Valley Authority Docket Nos.
50-259 50-260 50-296 By letter from D. G. Eisenhut to H. G. Parris dated May 29,
- 1984, we received a request for additional information regarding MPA F-55, (TMI II.K.3.28), Qualification of ADS Accumulators for the Browns Ferry Nuclear Plant.
Our response to that request is enclosed.
Very truly yours, TENNESSEE VALLEY AUTHORITY D5 D. S.
Kammer Nuclear Engineer Sworn to~d subscr bed before me this
~ day of 1984 Notary Public My Commission Expires Enclosure cc (Enclosure):
U.S. Nuclear Regulatory Commission Region II ATTN:
James P. O'Reilly, Regional Administrator 101 Marietta Street;,
NW, Suite 2900 Atlanta, Georgia 30323 Mr. R. J. Clark Browns Ferry Progect Manager U.S. Nuclear Regulatory Commission 7920 Norfolk-Avenue
- Bethesda, Mar yland 20814 8407170351 840712 PDR ADOCK 05000259 P
PDR 1983 TVA 50TH ANNIVERSARY An Equal Opportunity Employer
rh I 4 II rh
'vtf r
~
'(
I'r v
I' I
0 I
4 p
v rvr)
,4 ~
PI t
r I 4
All t,
(~
C Ikf'
~
I
~
hpvrp T ~
0 4
4 ~
4 I
'h ~
" vr).'
r r" 4
( ()
I I
4 f
h (fr
-:-4 4
~4- -I
~ pr4 I
,p k,
~
r ~,.v p,k
~
hpv I
'I hf I
h I
~ t p
~ r 4
4 l
~
ENCLOSURE
RESPONSE
TO DE G. EISENHUT'S LETTER TO H. G.
PARRIS DATED,MAY 29, 1984 - MPA F-55 (TMI IX.K.3.28)
"QUALIFICATXONOF,ADS ACCUMULATORS" BROWNS FERRY NUCLEAR PLANT
Reference:
TVA letter from L. M. Mills to H. R. Denton dated July 8, 1983 D. G. Eisenhut's letter to TVA dated May29, 1984 contains a request for additional information concerning the long-term (100 days) capability of the Automatic Depressurization System
('ADS) valves.
As indicated in the referenced letter, we have determined that the FSAR design basis (minimum of five actuations post-accident) is met using only the ADS accumulators.
Modifications are required in order to meet the 100-day requirement for ADS valves given in NUREG-0737 Xtem II.K.3.28.
Descri tion of Modification Our planned modifications will consist of:
a) separating the drywell control air system into two separate trains and, b) supplying each train with pressurized nitrogen from one of the separate Containment Air Dilution (CAD) system supply lines which are designed for containment purge/pressurization to control post-LOCA hydrogen.
This modification will allow for recharging the ADS accumulators for long-term operation of ADS valves by opening manually operated isolation valves.
A six-hour timeframe is available in which to perform this manual action as discussed in the referenced letter and the operations will be controlled by an approved procedure.
The nitrogen storage tanks for the CAD system each have a supply of liquid nitrogen to provide approximately 100 scfm for seven days.
The drywell control air system normally consumes less than 35 scfm.
The storage tanks are located outside of the secondary containment and can be refilled within the seven-day timeframe.
Qualification The system for recharging the accumulators will not be seismically or environmentally qualified.
However, the portions shared with the CAD system are fully qualified including the storage tanks and the piping up to the manual isolation valves.
Because the system will consist of two redundant trains of relatively few active devices, it is sufficiently reliable to meet the requirements of NUREG-0737.
Schedule This modification will be completed in accordance with the Browns Ferry Integrated Schedule.
1.
C