ML20235Y579
| ML20235Y579 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 10/16/1987 |
| From: | COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20235Y560 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 3685K, NUDOCS 8710200416 | |
| Download: ML20235Y579 (6) | |
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C ATTACHMENT'l i6
' PROPOSED CHANGES TO APPENDIX A TECHNICAL' SPECIFICATIONS FOR OUAD CITIES STATION UNITS 1 AND 2-i FACILITY OPERATING LICENSES DPR-29 AND DPR-30 Revised PaAel:
3.2/4.2-15 (Drp-29) 3.2/4.2-15 (DPR-30) i i
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' TABLE 3,2 '
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.POSTACCIDENT MONITORING INSTRUMENTATION REQUIREMENTS [Il
-Minimum Instrument-Number of Readout.
Oper%egan--
, Location Number.
0111 ParamatarL Unit 1 Provided Radat '
-I R'eactor pressure 901-5 1
'0-1500'psig 2
0-1200 psig 1
Reactor water level 901-3 2
- -243 inches +57.'
inches 1
Torus water temperature 901-21' 2
'0-200'F' 1.
. Torus air temperature 901-21' 2
0-600*F Torus water level 901-3 1
-5 inches +5 indicator inches (narrow range)
.(6]
' Torus water level 901-3 2
0-30 feet.
2
. indicator (wide range)
Torus water level-1 19 inch range sight glass (narrow range).
I 1
1 Torus pressure-901-3 1
-5 inches Hg to
-5 psig 2
Drpell pressure 901-3 1
-5 inches Hg to i'
5 psig 1'
-10 inches Hg to i
70 psig i
2 0 to 250 psig 2
'Drpell temperature 901-21 6
0-600*F 2
Neutron monitoring 901-5 4
0.1-108 CPS 2I43
.. Torus to drywell 2
0-3 psid differential pressure 1(8)
. Orwell Hydrogen 901-55, 56 2
0-4%
concentration-I 2(7)
Drp e11 radiatten 901-55, 56 2
1 to 108 R/hr monitor Main Steam RV posi-901-21 1 per NA tion, acoustic monitor valve 5]
Main Steam RV position, 901-21 1 per 0-600*F temperature monitor valve Main Steam SV post-901-21 1 per NA 2/ valve (5]. Main Steam SV position, 901-21 1 per 0-600'F temperature monitor valve 07325 3.2/4.2-15 Amenenerit No.
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QUAD-C8 TIES DPR-30
-TABLE 3.2-4 POSTACCIDENT MONITORING INSTRUMENTATION REQUIREMENTS (23 l'
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' Minimum Instrument-l Number of
. Readout.
Opergegan.
Location Number Parameter Unit 2 Provided Range
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1.
Reactor pressure
'902-5 1
0-1500 psig 2
0-1200 psig.
1 Reactor water level 902-3
'2
-243 inches +57' inches
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Torus water temperature 902-21 2
0-200'F
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1 Torus air temperature 902-21 2
0-600*F Torus water level 902-3 1
-5 inches +5-indicator inches (narrow range) 2(6)
Torus water level 902-3 2
0-30 feet 1
indicator.
(wide range)
' Torus water level 1
18 inch range sight glass (narrow range) 1 Torus' pressure 902-3 1
-5 inches hg to
! psig 2
Drywell pressure 902-3 1
-5 inches Hg to 5 psig j
-10 inches Hg to g
1 70 psig 2
0 to 250 psig 2
Drywell temperature 902 6 0-600'F 2
Neutron monitoring 902-5 4
0.1-108 CPS 2(43 Torus to drywell 2
0-3 psid differential pressure 1(8)
Drywell Hydrogen 902-55, 56 2
0-4%
concentration i
2(7)
Drywell radiation 902-55, 56 2
1 to 108 R/hr i
monitor Main Steam RV posi-902-21 1 per NA tion. acoustic monitor valve q
Main Steam RV position, 902-21 1 per 0-600*F temperature monitor valve Main Steam SV posi-902-21 1 per NA tion, acoustic monitor valve 5]
Main Steam SV position, 902-21 1 per 0-600*F temperature monitor valve j
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I 07325 3.2/4.2-15 Amendnent No.
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= ATTACHMENT 2 j
SUMMARY
OF CHANGES l
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.As a-result.of modifications completed in an effort to meet the requirements of. NRC Regulatory Guide 1.97, the following changes have been
. identified for-Quad; Cities station Units 1 and 2:
~(1) Pages 3 2/4.2-15 (for DPR-2) aad 30)
Cbange the range for the drywell pressure recorder scale 3
from "O to 75 psig" to "-10 inches Hg ta 70 psig"
'(2) Page 3.2/4.2-15 (for DPR-30)'
Change the number listed under Instrument Readout Location as Unit "1" to "2" to reflect the fact that this instrumentation pertains to Unit 2, not Unit 1.
This change corrects a typographical error.
This is considered to be an administrative change'.
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.J ATTACHMENT 3 EVALUATION OF SIGNIFICANT HAZARDS CONSIDERATION l
POST-ACCIDENT MONITORING INSTRUMENTATION REQUIREMENTS l
(Table 3.2.4 for. Quad Cities Units 1 and 2, Page 3.2/4.2-15) l In order to meet a NRC Regulatory Guide 1.97 commitment for the drywell pressure recorders, Commonwealth Edison has replaced the scales associated with them and recalibrates corresponding instruments. This scale change needs to be incorporated in the Technical Specifications. There are i
no hardware changes associated with this modification. The range for the drywell pressure recorder scale is listed as "from 0 to 75 psig" as currently. indicated in the Quad Cities Station Technical Specifications.
The requested change is to replace the words "from 0 to 75 psig" with "-10 inches Hg to 75 psig".
This proposed change also provides
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indications of negative pressure of the wide range. This proposed change also provides negative drywell pressure indications on both scales of the recorder and meets Commonwealth Edison commitments to Nhc R9gulatory Guide 1.97.
Additionally, this change will provide the operator with itamediate visual trending for this parameter on the front panel.
Indicators providing indications up to 250 psig are present on front panels, ensuring adequate indication should drywell pressure exceed 70 psig.
An additional change is being made for Quad Cities Unit 2, DPR-30, which corrects a typographical error on Table 3.2.4 where reference is made to Unit 1 instrumentation rather than Unit 1.
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BASIS FOR NO SIGNIFICANT HAZARDS CONSIDERATION l
Commonwealth Edison has evaluated this proposed amendment and determined that it involves no significant hazards consideration.
In accordance with the criteria of 10 CFR 50.92(c), the proposed amendment does not:
(1) Involve a significant increase in the probability or consequences of an accident previously evaluated because:
L (a) The proposed amendment merely changes the scale for the drywell q
pressure recorder fer Quad cities Units 1 and 2.
Changing the t
scale does not increase the probability or consequences of a f
previously evaluated accident-(b) The additional proposed amendment for Quad Cities Unit 2 corrects 4
a typographical error.
This change is considered to be administrative in nature, and does not affect the probability or consequences of a previously evaluated accident.
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'd).' Create.thelpossibility'ofanewordifferentkind'ofaccident.from.any.
previously; evaluated because:
(a) The only change being made as a result of this proposed amendment
.,s to the scale for the drywell pressure recorder. This change
.iloes not allow any.new modes of: operation which could initiate a y
new or'different kind of accident.
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(b).The a'dditional. specific change to DpR-30..is. considered to be l.
administrative'in nature. Correcting a typographical. error does l'
not create.the possibility of a'new or differnt kind of, accident from those previously evaluated.
(3)- Involve a significant reduction in the margin of safety because:
1-l (a) 'The only equipment change being made as.a result of this change
'is.to the scale for.the drywell. recorder. This change allows.
Commonwealth Edison to meet the requirements of NRC Regulatory Gui:le 1.97 and allows the operator to perform immediate visual trending of this parameter on the front' panel. As a result, the L
margin ~ of safety has not. been decreased.
(b) The additional change to DPR-30 is considered to be administrative and does not present-a reduction in the margin of safety.
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Based on the preceeding assessment, commonwealth Edison has
'determinedLthat this proposed amendment involves no significant hazards consideration and requests its approval in accordance with the provisions of 10 CFR 50.91(a)(4).
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