ML19271A936
| ML19271A936 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 07/28/1980 |
| From: | Furr B CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-17, NO-80-1114, NUDOCS 8008110230 | |
| Download: ML19271A936 (6) | |
Text
, _ _. _ _ _ _ _ _ _.. _ _ _ _.. _ - - _ _ ~ _
- I
- 4
[
thew s-ustmo FMe..^n SM n A NT A. 2':..".
3 Ca*ol!na Foner & liq'it Corrpany 30 Ml N Jul - 2,1980 FILE:
B0'8-13514 SERIAL: U0-80-1114 Director
!!r..Jaces P. O'Fcilly, Director Deputy Director
.U. S. I:ccicar Regulatory Cor-f ssion go..t to Director Izgf en 11, Suite 3100 Admin. Officer 101 !!ariet ta Street ti.W.
BONS Chief t.tirmta, GA 30303 RCES Chief FFMS Chief DRUI;gtTICE SIEA'f ELEC1RIC TLtdiI, imIT li35.1 & 2 LICL!'SC ties.11FR-71 AND DPR-62 Sfgds Chief DOCTEI I 05. 50-325 AND 50-324 P A Q(ficer S!'T T L'"r'7IAL PI':TESC 10_ It BULLETIri 20-17 Frpgu ?!6 n A-Q uo 11 car !!r. O'Ecilly:
4.:.p g InIerpenee to your letter of July 3,1980, transef tting -IE Bulletin 80-17, Carolina Poucr & Lipht Corrany is subr_itting the following additional infor-tction for the Brun:.vich Stcce Electric Tiant (DSEP).
The rertuired 1:anu11 and *.uto=ath scracs (in that order) have beca perforced ratisf actorily on BSEP Unit
- o.1.
All control rods inserted within the allow-able Technice) Specification tires and no residual vatcr was fcund in the scram dicchrirre or instrtgent volure af ter either scram.
Additiens11y, testing per-f orr.cd as prerettuisites to scram testing and the data resulting frc= scram tenting indicate that no blockage e.r.ists in the scram discharge volu=e vent and drain lines.
Specific responnes to items not previously addressed are liste.d below:
~
2a.
All rod insert tices were obtained by video recording the full-core display at 30 f rnees rer second and censuring the tices fec= scrc: initiation to rcccipt of the full-in Ercen light for all rodo fully withdrevn.
The tices fro = acra: initiation to the last rod in from the video analysis are 3.33 ceconds for rod 26-15 (Inst rod in) on 2:anual scra=, and 3.20 seconds for rods 30-27 and 34-23 (last rods in) on Auto: atic scran.
Several rods were, nisned because of burnt-out bulbs on the grees-in light (ten rods on "J A.-
!!cnual scres and two rods on Autoratic scrac).
A corruter printout. (DD-7, OPI 2) af ter each scram verified all rods at Position 00.
...c,In addition to the video-recordings, five individual rods were monitored on a Brush recorder on each scram.
The individual red scram times censured
' ', ' " were within the Technical Specification allowable scram times.
These times, f rom Notch 48 to Notch 00 for cach scram, are as followa s.
c.,..
g
}.~; l (
~. : ':$.
2 l'_..l..
.e.-
m-m.
.s.
.. c.:4 y n: c e +. ';:- w.'. :.;i c :. ~ c. -u G. a y.,
j'-
.: e
- 9.
~w
.c - ; ~
.~
d i; % N h. h, hgikh h hh $ Y m
S i -u
- y,. DOCUMENT.CONTAINS
..,,P00R QUAllTY. PAGES.,M_,
. s c.... c...i m _.
..a.
zg-7 s u,,,m_
2
'W.D 7 W ' ~ E ?.*E 335 Fars t: calla Street P. O. Bos 1551
- Raleig'i. N. C. 27602 j., [.,. u,_..
~
.}.
s Mr. Jarra F. O't.cilly '
July 28, 1900
_C utrol I'od Ihnut1 SerceTeq Autcritic Serc-Tir e 14-35 3.26 sec.
3.10 sec.
30-11 2.83 sec.
2.81 sec.
46-43 3.05 sec.
2.95 sec.
26-15 3.28 sec.
3.06 sec.
06-27 3.03 see.
3.02 sec.
2b.
Scrac Logic Eus A, Croupo 1 through 4 and 5::rs= Ixgic Bus BA throuch 4.
, Groups l' scrua and zero voltage on thcsc buses af ter scras.These recordf.crs show 2c To obtain th!.n information coils on t.he bacFup scrae v,alves, and a technician was stationed at thevol bochop scra+2 valves to verify th:.L the valves opened and reeained open.
Observation by the technician of the voitteters indicated that the role-neids were de-cucrciccd prior to scrac energized duries the scra=, and rc=ained cncrgized until the ecrac was, reset at which tice they de-energized.
Additionally, cirficte froa these valves during the scram was verified to These valves energice to open. occur altr.:ltanecualy with the voltceters chewing 2d.
from the preccen cerruter.The reasurettnts for this item were t:ade using a stopva the Control P.oce clock prior to cach scram.The process corputer clock was synchronized Tho' data obtained on this baals is na fo11cus:
Ibnual Autocatic Scrae' Scrac Tiec to fill to volume 33 Seconds 34 Seconds Uot Dralmed Alarm Tice to fill to Rod Block.
1 88 Seconds This Data was not
\\'
7.,U,.-f..s.
Obtained Due to a
, y ;,.'.
Process Corputer z-ttatfunction (See t 'j r.,
_. :... ~.; " -
Ite= 2k)
Tice to Till to Scrac -
26 Seconds This Data was not Switches _..
y
' ~ ' ~_
~~
Obtained Due to a
- 7 c. '. ~ - l
.,'f N
. ^.
Process Co puter l'
tfalfunction (See a t.:
t Itec: 2k).
' +,,, - - _.
G..
3, ' '
~~
f _ *fL ;
,*} *?.
S'.-N"?U "u'
.j
+-
^
^
~
~
~
_y,
g%
..w
-.u.pg
,e
".. J~
- T. 0*I._ illy July 18, 1980 Ihr c li5rrtf n of the scra-d'.scharge instrument Irvc1 svltchen was s crified prior to scra= testing.
cuJ:chre vec vcrified on iuctenniet and decrensing level atThe proper sequcatini crc Luting tha scrc: testieg, it is believed that the arFercat 'irproper this tire.
s'yuric cecittic:w cr.istion in the SDV, coupled with thc ecth dcevuw develep~_ut of en air Icck atthe bigh level aln.rr ced rod block switch, centrib e
- rrand!nr. te tbc increasing level.these svitches, prevcating thc= froc re-dit cetly to th
Since the cerer levci switcher vent t.M high lev--I and red bicch switches do), the vcnting air ban nvent line (
cd vcut path which a11cvs ther to rcepend to an increnning lerci.a imrcotrict-rtcut"ne tr.:"<:fcnt data chcus that the dicchargc volu. e ves at 70 psig 26 The FCCOMO Gitr.r VeUt EDd draln vD.1Ves iDdiCQte Closed (40 GCCondU
!pu.ual s c rc-).
P ofter be 4 pri,g/nccend from thc' prcst:ure transicnt data.this tire, the r. rec 3ure incre This prencure and t.he high Icvc1 cinre and rod bioch switchen.pruarure inetcare rate contribu The er. tent to which they
.contributc rennot be detereintd frem the tect data.
f hu;:ever, thct the purpose of the high icvel alare and red block switchesIt shpuid be not such, are not required to be functional during an actual scrc=.is
, as 2c.
This it.co var ad3resced in the initial rernonce dated July 10 Scrial !?o. Im-CD-1052,
- 1980, 2!..
The delay tir.e frem scren initiation to clocure of the SDV vent and drain vcivce Ecs c.caiuted as follows:
Velve
-Ibnual Scran line Auto atic Scran Time Vent 13 sec.
13 see.
Drain 15 sec.
16 sec.
2r.
2hc eneple renulte for particulaten were 10 ppm for the !! ant;al scran and 3 pen for the /.utomatic scram.
'h.
Ibe rcpcctabIc retcrccce Icvc1 chosen for this censurei ent was the scram dischatr,c volu c (5DV) not drained annunciator level.
tir.es frc The reneured drain Icvc3 of the SDV pot drained annunciator level was 127 seconds f
!!anual scram and 121' seconds for the Autoratic scran.
It is worth noting that the SDV. pressure transient data Indicates that
..x-the tite of scram reset, the SDV was solid with water.
, a t, /, '
by Titin is substantiated c fact that even theuch it toch 31 seconds less tire to react reatic cerce, the overall drain tice from scra:
the Auto-reset t SDV not drained
'
- C.. ',
f.4. s l-?
a7 4
., - ~
s.
. - * =
w
..,. ~
- ,. y.4 C;
.: ;. 3 ',l5,'.~ d :. ' - e.'*T )-
-~ "~~
~
~
~T? -^
^
w...a..
~
l.'r. J m s F. C'Acilly July.2 S,1939 annuncictor reset (th.e repentable Icyci) was the s' =e-9 einute.= 23 eecends a
fer the. II. cual scre and 9 trinuter 15 seconde fer the Auterstic cerar.
This dotc civ.o verifits thtt ce biccLage crists in the ver:t er d nis line the drain tire pensured during the testing. to verify that un ebstructica at cr.iste ir the scat and drain line (SP-80-23) was 112 me:: ends.
'21.
Thir tealteri g was rcrferred prior to and ic=cdiatc1 and Autocatic scrans I y perforrins FI 1.4.
7 after the ihnuel IM residual vater uns found tor was any cir heard to enter tbc SDV durire the perictrance of PI 14 follo ing the scen s ca var. identified at Erewn'a Terry...
7J.
The ten-accend tire delay relays ucre continueusly coniterol during the 15nual ced t.utcr: tic scra s.
The recorded data shows that the tire dcicy 9.58 sc ends during the Auter:ctic scen=. relay cer.tnets which ret be cloned 8 olc:cuce cn this reicy.
This in within the 10 + 1 r.c;end 21..
The dato cc:parisen ves Perforr ed and no unenpinined inconristencien ucrc noted.
Data previcurly obtaincd is cc: pared to rcrae data in IF.!!'a' 2c, 2f, and 2b.
the 1:ccual cnd Aute : tic cerces occurred during the Autocatic scrcn.Ib incensistency cccurred Shen the process cc7Tuter's scquence of evcots This subcyeter sterage tuffer npparently fillcd to capacity (09 pointo) due te contact beunce end/cr ncise.
L' hen this happens, the software then blocks iurther detectico of toint changes until the buf f er infort:stien han been printed.
7 bis caused a loss of data pointa for approximately. one c.inetc.
Zurther, only 33 ch:rg:a of stetc out of an er.rected 60 vere printed, and these occurred en crJr fcur dif ferent points.
An investigation has been initiated as Le uhy the sequence of events harduare and software were not nbic to handle the t.uto-atic scran data as errected.
No probice was obscrued during the I:anual scram with the sequence of events subnystec:.
3.
/.t the concluciou of the !!anuai and Autcratic scrats teotn, the dixcharEC volune was verified free of water by opening a drain valve associated with the hiph Icvc1 alarw Icvci evitch and observing no vnterflow (FI 1.4).
AIno, the vcat and drain valvss were cycled to verify preper operation and that.they scrc open.
For al.1 future scrccc, the Scrern Report Sheet of Il-31 has been revised to require initicled verification that the vent and drnin valven have been cycled clored and open and that the acra:n discharge voluee not drcined ainrm has closed and been reset.
~
4.
A review of the c crgency operating procedures has been cor picted.
a These.
procedures have been revised, where required, to :cet the requirementa f" nddresacd in this itet:. "'-
J.
~
Operator training required by Ite:n 4e has been corpleted with the c7.ception of three operators who have been on vacation.
'Ibe training for these operators should be cc:plete by August 1,1980.
s.
- x 9-s : ~ :.. ~ :. ~ C. ^ ..
.. _ ^
'g.
3
. l.
- ~
.t.jif,f f 7 -1 J
~
l.::';.'.LLL.....+ '- 1.~.kll,. A : n <
A A*-
- 7..
" ~:- '
';. 3;; :.;. f *
' ='.
?.
i
- ~ " ~ " - ' ' ~ ~ " ' * ^ ' ~ ~ ' ' ~ ~ ~
4 e
":. Jr:s p. O ' Et illy July 26, 1980 3.
1 rurvcillme procedure has been developed to renitor the SDV dcily for vittr Icsiduc.
As rquired 11 Ite:: A5 of IE telletin 60-17, Surrlcrest Fa.
.1, th'- vill centinue en a daily bculs until a continuous caniterfug is cicratienal.
ry s t t:-
T1mt pre.".sdures have beczt writtenand/crrevincdtoashurethatthe Icquit cd prcrpt notification is given when the ITCI, p.CIC, ELC3, FII/fi'P/
I nal c alint, or cat-i etcem hypces systeca are less than fully crerabic.
Freccdure - have nise been reviced to require that all a.allabic sittpres-vien Peel centing is uced whenever the supptcasica pool exceeds the norn21 operating Lt-pcroture lintt.
O c.
I.10Sr.GO.59 review of increasing the Standby Liquid Cengral System (SLCS) ir.jtetion rate was perIcr:cd.
There are two areas of concern:
The irract on the integrity and reliability of SLCS.
'1he nucicar-hydraulic recpunsc of the reactor.
A nignifitcht lucrease in the icjectica rate could best be accorplished by operative buth pu-ps cencurrently.
This yould rcquire eodificatien of the SLCS c6ntrols cn1 Icgic.
Annu-Los rcactor prescure f o 1000 pai, the diocharge pressure and flow rate for one-pu p operation is 1190 psi.and 43 pp..
h e-rury operatien vould raise the discharge pressure and flev to 1400 p:ri cnd 70.gr The discharge pressure and flow are lir_ited by the relief valves which are act at.2400150 psi en the discharge of rystem tbc SLCS pu Ts.
they relieve to the SLCS pu p suctions to injection would cc:While the relief v 2tinue at e b e u t. 7 8 s p e,
f.dditional revicy t.ould have to be perforred to detcrnine the inact of custained flov throuph the relief valves, no that is not a nor t 11 r-ode of creration.
accienulatorn al o need to.be ena:-ined.Acy pessibic effects on the SLCS pu p dincharge Reducing. the SLCS purp dischorne pressures wculd rcluire enicrEing the pump suction and diccharge lincs.
The sccend centern is with regard to the nucicar-hydraulic response of the recetor to the nearly doubled injection rate. The eF19 ting Enfety analyGIG is bneed on e flev rate of 43 gpm which corresponds to a beron injection.
rete of 6 to 25 ppe per minute.
The upper injection rate li=1t was estab,,
lished to assure there la sufficient c1xing in the reactor and recirculatica system piplug so that the boron does not recirculate through the core in uneven concentre.tiens which could pocoibly cause th nuc7 ear power to rise nud fell cyclically.
As a result, the cristing safety analysis 10 pot direct.ly applicebic for this case and another is needed
'to verify safe renctor rarponse.,,_
... 4 " :. i:,..
n
-2
-~
m
-f, M
S >
,4,,
'S e-( IU f ~,
.J.-[- T*..
' ^
4
- :.. d [ - ~~; ' d **.*I.', C N' S $.$
"'b
d
E
' M. Jer.i.c P. O'Egilly t,
Ju17 28, 1980 Tince. there are several unrcro!vcd concerne regardinn two ELCs pu=p 4(ratien, r rc zcView is neceraary Lafore it can 1c dctermine:! te bc E '.., I.
I N :. f. zdditienni gepfCMU li113 bC 1:* b 1duti phnt attica is taken.
PCr[Or::'Od before cry E'h!itional 1 curs very truly, s
m
./ )
<o
.n n
's 1
4/. (.fda.4W Ytz.
E.- J. Turr M
Vice President Ibclear Operations
- .,,..f T.,..J
,b 11r. R. A, Ucrt f f cid I.'r.
V. StcIlo, Jr.
s s
L
. =
.-n
, =
.e
. ~
t
. ~;.
~. -
.. =..., s. x '
-v
. v,. j e.
4, t,,.
s-...
e ~.
......>s.,
. i n o.r e,v.
.,e. a 2-
..s,.,I.,. z /.,
..at..
- $. s.= 1 c a.' -
o,r.
A. 3 A.w.
..\\._ ;.,..,..
s~~ *p
....'s
-,k '
[4.'*L.e - < 5 '.
S.. S. -
/
-. -a.~,,
e..
~
. '..':. -. 7 l.
r+.
-. ~ -.
. o. r; '.
Y
~... -
,s.
~ -
,.s
.n.,
.- r.
..i
- r.. :
s
.?..
-.. y:?.. e.',,.'.1... '
- t.,
~ r
- .m..
'.~,-.-*'e,'
l
- s.
S.
t.
s..
t
.n.m-...-
4
- .c.,...,..-
a s,
..v.
.e
...-s
.y r*,.
. ~..,. - -.
=.,.
.,5
~e e
~
.y:
s' t ;,
,,..i. :. % _ f.
- t. '
l e..
,s,,.
5,.
.,s
.-s.
._a..
e-
--4 s-s 3
'.4
,.d
- I.
~.
(
a h
Z
..w,....
"f c;.. :. N e-.
s-.l-I'.' 4 3s Jag"C;*;3.,-.* - ",
-: e
-e s....,,
'. t 'g _i p '. * '
k
.s_
.g, 7
...._............+s...'.u...,us
<-4...au.u
~.. -. -
.'