ML19322C588
| ML19322C588 | |
| Person / Time | |
|---|---|
| Site: | Crane, Davis Besse  |
| Issue date: | 04/05/1978 |
| From: | Tambling T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Knop R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| TASK-TF, TASK-TMR NUDOCS 8001170912 | |
| Download: ML19322C588 (6) | |
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j SA.;y/j bdEI M 8 T7 April 5, 1978 i
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Docket No. 50-346 L
R. C. Knop, Chief, Reactor Projects Section 1 MEMORANDUM FOR:
T. N. Tambling, Reactor Inspector FROM:
RECORDING INSTRUMENTATION TO RECORD
SUBJECT:
REACTOR TRANSIENTS, DAVIS-BESSE 1
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it was, brought inspection;;(Inspection Report 50 346/78-04),to continuously r 7,
7 During a recent to the licensee's attention that their%bilitys psystems tiemperature. and; pressure parameters;d
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Reference to!.I&E. Bulletin; iplanned ; transients' appeared to..be; inadequate. 3175-0 to, the se:
[S licensee, during construction phase for i The inspector requested a licensee's position.
wa's' required).
di),arepresentative interview [(k5spectionReportI50-346/78-During an exit of the licensee stated the following position:
They felt that no further action was required on their part.
1.
logged During normal plant heatups and cooldowns, 2.
that Technical Specification requirements are met.
l dl 3.I An operator.has trend recorders.that.canLbe used to follow'n
' parameters.
d printout The station alarm and trend computer can be used to alarm an blished limits.
when selected plant parameters exceed pre-esta 4.
1
[duringthe This subject had beenhddressed in 1976 and 1977 with NRR i tionjprotec-pre-license review of thelgeneric issue on cver-pressur zafrom L t
5.
l tion, reference was made to a letter to J. Sto z l
April 7, 1977, serial no. 260.
7-8 in the FSAR.1/
I have reviewed this letter and it does reference Table ilable for This table lists recording and indicating instrumentation ava i
l (copy of table attached).
readout of system parameters, Paragraph 11, page 13, Interim Solutions for Enclosure 1.
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April 5, 1978 R. C. Knop It was pointed out to the licensee that availability of continuously recording instrumentation was also.to their_ advantage to that there..
would be. data,to @ionf thet(unplanned,traasisats, fit. pre-analysed _ trans-:
hient and/oriconponent:cyclellimitations;; Specific. examples; cited we t
the September '24,1977. sudden' depressurination: of,the reactor sys em rea'ctor coolant flow. As it happens
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andjNovember'29,}1977lloskofxduring th"ese events a reactimete used at;the time and provided very useful data.
The be returned to B & W at the end of power ascension testin there were no definite plans.
data acquisition system but that The specific arcas that the licensee's recording instrumentation appears tobe! inadequate}are:
o 520-620 F
- 1. p.. v-.n.
, n4 eactor coolant;1oop. temperatures;are recorded only in the n-
. _ g R
irange.
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r iRecorded temperatures are averagesjof loops.
t.
2.
- 3. I?ressure wide range recorder, is the average of the loops with a max
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. m mum pressure'of 2500 psig.' "
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hteEE}g^e'nerahr'_piessur'es'arenotrecorded.
4.
5.M-actoicoolant f1 M is total, not individual loops.
~~
- Chart scales and recorder chart speeds are good for only slow transie (not good for time responses).
6.
or maximum-minimum points.The consequences of many accidents are tim Note:
atDays-BesseIfd'oes"not) t appears that. critical.instrumentationt 7 meet the' intent of Bulletin 75-08 andLReg: Guide 1.97
,t to aid in deter-
,Since i.
investiga-mining lthsfcadseand"co'nsehence,of.eventsforpos_taccident_be transmitted
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, tion,t it a is recommended (that ;the; above - information
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(I&E. Headquarters forl resolution.
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Reg Guide 1.97 also suggests extended ranges for certain mon It cannot be ascertained as to whether these should
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parameters.
be recording ranges or over range protection.
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T. N. Tambling Reactor Inspector
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TABLE 7-8 t.
INFORMATION READOUTS AVAILABLE TO THE OPERATOR FOR MONITORING CONDITIONS IN 20 REA_CTOR, REACTOR COOLANT SYSTEM CONTAINPai VESSEL, ECCS SYSTD4S. AND._ TEAM GEN S
Indicator
- Accuracy,
% of Full Indicator l25 Number of Type of Sensor Indicator Range _
Scale Location M esured parameter _
Readout _
Channels 2
10 to 10 cps 13 A,B,D l10
~1 prcorr.ngeneutronlevel(NI)
B,F,E
-1 to 10 dpm
+3 A B.D 2
Irco range startup rate (NI)
A,F 3srm3dicte range neutron 2
10 to 10 amp
+3 A,B,D l10
~11
-3 Bcval (NI)
B,F
-3 (NI)
E 1
10 to 10
+0 5 B
3Grm:di,.te range neutron
~
25 hval 2
-1 to 10 dpm
+3 A,B,D Gcrmsdicte range startup Eicte
.h 0 to 125% FP
+2 A,B D l10 (NI)
A,F (NI)
A,F 0 to 125% FP
+0 5 B
l25 prrIngeneutronlevel 1
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var range neutron level (NI)
E h
60 to +65% FP
+2 A,B.D l10 20 krrrngeneutronlevel (NI)
A,F leop outlet temperature **
A,F, ANN.
k in each loop 520-620F
+2 A,B,C,D.
imbalcnce 520-620F
+2 B,D unit outlet temperature ((tac **
E,F, AIM.
loop inlet temperature A,F, h in each loop 520-620F 12 B,D 50-650F.
520-6207
+2 B,D unit inlet temperature A,F, ANN.
520-620F
+2 B,D A F, ANN.
~
520-620F 2
B,D loop cverage temperature unit everage temperatureh O
,,E,F, ANN.
O to 70
[2 B,D loop temperature difference A,F, ANN.
-10 to +10F
+2 B,D unit tcmperature difference A,F, ANN.
0 to 70F O to 2500 psig i2 A,B,C,D looppressure**(DAC"A b )
A,E,F, ANN.
1700 to 2500 psig l2h A
1 in loop two O to 500 psig
+2 B
A,F, ANN.
2 0 to 320 in.
72 B,C,D l20 loop low range orcosure scurizer level (ft " M )
A,E,F ANN 1
0 to 320 in.
[2
.B,C,D l25 ssurizer IcVel **
+2 B,D 2
0 to 700F 6 asurizar temperature A,F 0 - 90 x 10 lb/h 73 A,B,D 20 A,F, ANN.
b in each loop O - 180 x 10 lb/h
[3 A,B,D loop flow total flow E,F, ANN.
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TABLE 7-S,(Cont'd)
Indicator
- Accuracy, Number of
% of Full Indicator l25 Type of Sensor Measured Parameter Readout Channels _
Indicator Range Scale __ Location _
BWST level' A,F, ANN.
k 0-50 ft 11.5 B,D l13 level **
A,F, ANN.
2 in each loop 0-250 in.
12 B,C,D Steam generator startup range Steamgenerator(operatipg(Lai m 'aa e h E
ANN.
1 in each Icop 0-250 in.
10.5 B,D 25 range level D
Stemn generator operating 2 in each loop 0-250 in.
F range level A, F, ANN.
1 in each loop 0-600 in.
12 B,D Steam generator full range level Station electrical distri-12 BD bution' A,C,F 2
B C.D Auxiliary feedvater status ##
C,F, ANN.
1 per loop l10
+1 B.A.D 0-60 psia
'tContainmentvesselhydrogen**A,F,E, ANN.(M"
)k 0 - 5%
12 B,D,A
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Containment vessel pressure A,F, ANN.
0 l.
1 2
4 Containment vessel radiation B,F, ANN.
k tt il B,A,D y
tContainment vessel post-B,F,E, ANN (MOV)2 10 - 10 cpm 12 B,D,Al10l13
!20 6
20 W
accident radiation **
B,D Containment vessel isolation 1 per valve 12 B,D status **
C,F ANN.
1h B,D Containment vessel temperature A,F,
"'FAS status ##
C,F, ANN.
k B,D dafety fectures equipment 2
B,D status **
C,F RPS status **
C.F.
ANN.
2 B,D 2
CF B
SFRCS status **
Manual B
C HPI system bypass status Manual C
LPI system bypass status 20 B
Containment spray system Manual C
5j 7 bypass status B
"7 Core flood system bypass Manual B
l C
status Manual C
dy BWST system bypass status
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TABLE 7-8 (Cont'd) e'.
Indicator
- Accuracy,
% of Full Indicator l25 Piumber of Type of Sensor Readout Channels Indicator Range Scale Location Measured Parameter B
Containment air recirculation Manual C
system bypass status B
20 Containment air cooling sys-Manual C
tem bypass status B
Emergency ventilation syster.
Manual C
bypass status Steam generator outlet 1 in each loop 0-1200 psig 12 B.C.D pg AF pressure **
D Steam generator outlet 1 in each loop 0-1200 psig pressure ANN.
2 in each loop 0-500 gpm 12 B,D F
6 High pressure injection flov** A.F, 42 B,D Lav pressure injection (DHR)
A,F, ANN.
1 in each loop 0-5000 gpm Containment spray flow A,F, ANN.
1 in each loop 0-1500 gpn 12 B,D flov**
Core flood tank pressure A,F, ANN.
2 in each tank 0-700 psig 12 B,D
+2 B
Core flood tank level A,
ANN.
2 in each tank 0-lh ft H O 2
T2 B
E Decay heat pump suction temp.
A, ANN.
1 in each loop 0 400F ANN.
1 in each loop 0 h00F
[2 B
-a Decay heat cooler outlet temp. A, B,D HPI system pump and valve 1 in each loop
,O C,F status **
B,D LPI system pump and valve 1 in each loop status **
C,F B,D Containment spray pump and 1 in each loop (valves, 2 in each loop) valve status **
C,F B,D Core flood valve status **
C,F, ANN.
1 in each loop B,D BWST valve status **
C,F 1 in each loop B,D Containment emergency sump valve status **
C,F ANN.
1 in each valve E,D Containment air recircula-gg tion fan status **
C,F 1 in each loop gg BX XX na US o
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TABLE 7-6 (Cont'd) i.
Number of Indicator Type of Sensor Accuracy.
Measured Parameter Readout Channels
% of Full Indicator Indicator Range Scale
-Location Containment air cooling fan status **
C,F Emergency ventilation system 1 in each loop B,D fan and damper status **
C,F 1 in each loop B,D I
Legends:
Type of Readout Indicator Location A - Linear scale indicator B - Log scale indicator ANN. - Audiovisual alarm A - System cabinets C - Indicator light indication (non-B - Main control boards D - Digital indicator Class IE)
C - Auxiliary panel 20 I"
E - Recorder D - Station computer printout F - Station computer output (this output non-Class IE)
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'S Notes:
Two or more signals are combined to produce the indicated parameter Indications are required surveillance equipment on safety systems for safe shutdown and accident monitoring and utilize the design criteria listed in section 7 5.2.1 (Readout type post-A, B, and C only).
I t
Post-accident monitoring by redundant essential sensors with one (1) channel recorded tt To be determined after full-power operation.
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