ML20211E630
| ML20211E630 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/13/1987 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20211E597 | List: |
| References | |
| NUDOCS 8702240366 | |
| Download: ML20211E630 (4) | |
Text
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r TABLE 3.7.1 PRIMARY CONTAINMENT ISOLATION M 31 M Isolation Valve (Valve Number)
Number of Power
~
Group Identification Operated Valves Maximum Action on Operating Initiating Inboard Outboard Time (Sec)
Position Signal 1
Main Steam Line Isolation (MS-1A, 2A,18, 28, IC, 2C, 4
4 35T55 0
GC ID, 20) 1 Main Steam Line Drain (MS-5) 1 35 C
SC 1
Main Steam Line Drain (MS-6) 1 35 C
SC 1
Recirculation Loop Sample Line (SM-1, 2) 1 1
5 C
SC 1
1 solation Condenser vent to Main Steam Line (IC-6, 7) 2 5
0 GC 2
Drywell Floor Drain (55-3, 4) 2 20 0
GC 2
Drywell Equipment Drain (55-13, 14) 2 20 0
GC 2
Drywell Vent (AC-7) 1 10 C
SC 2
Drywell Vent Relief (AC-9) 1 15 C
SC 2
Drywell and Suppression Chamber Vent from Reactor 1
10 C
SC Sullding (AC-8) 2 Drywell Vent to Standby Gas Treatment System (AC-10) 1 10 C
SC 2
Suppression Chamber Vent (AC-11) 1 10 C
SC 2
Suppression Chamber Vent Relief (AC-12) 1 15 C
SC 2
Suppression Chamber Supply (AC-6) 1 10 C
SC 2
Drywell Supply (AC-5) 1 10 C
SC 2
Drywell and Suppression Chamber Supply (AC-4) 1 10 C
SC 5
Cleanup Deelneralizer System (CU-2) 1 18 0
GC 5
Cleanup Deelneralizer System (CU-3, 28) 2 18 0
GC 3
Shutdown Cooling System (5D-1) 1 48 C
SC 3
Shutdown Cooling System (SD-2A, 28, 4A, 48) 4 48 C
SC 3
Shutdown Cooling System (5D-5) 1 48 C
SC 3
Reactor Head Cooling Line (HS-4) 1 45 C
SC 4
Isolation Condenser Steam Supply (IC-1) 1 24 0
GC 4
Isolation Condenser Steam Supply (IC-2) 1 24 0
GC 4
Isolation Condenser Condensate Return (IC-3) 1 19 C
SC 4
Isolation Condenser Condensate Return (IC-4) 2 2
NA 0
, GC 1
19 0
Feedseter Check Valves (FW-9A,10A, 98,108)
Process Control Rod Hydraulic Return Check Valves (301-95, 98) 1 1
NA 0
Process Reactor Head Cooling Check Valves (HS-5) 1 NA C
Process Standby Liquid Control Check Valves (SL-7, 8) 1 1
NA C
Process 5
Cleanup Deelneralizer System (Cu-5) 1 18 C
SC l
Millstone Unit 1 3/4 7-16 P
1
?
d S V FOOTNOTES FOR TABLE 3 7.1 Key: O
= Open C
= Closed SC = Stays Closed GC = Goes Closed NA = Not Applicable Note: Isolation groupings are as follows:
GROUP 1: The valves in Group 1 are closed upon any one of the following conditions:
1.
Reactor low-low water level (This signal also trips the reactor recirculation pumps.)
2.
Main steam line high radiation.
3 Main steam line high flow.
4.
Main steam line tunnel high temperature.
5.
Main steam line low pressure.
GROUP 2: The actions in Group 2 are initiated by any one of the following conditions:
1.
Reactor low water level.
2.
High drywell pressure.
GROUP 3: Reactor low water level alone initiates the following:
1.
Shutdown cooling system isolation.
2.
Reactor head cooling isolation.
GROUP 4: Isolation valves associated with the isolation condenser are closed upon indication of either high isolation condenser steam or condensate flow.
GROUP 5: Reactor low-low water level alone initiates the following:
1.
Clean-up demineralizer system isolation.
Millstone Unit 1 3/4 7-17
o Docket No. 50-245 B12401 Millstone Nuclear Power Station, Unit No.1 Line Break Off-Site Dose Calculations Reactor Building EEQ Profile February,1987
TABLE 1 LINE BREAK OFF-SITE DOSE CALCULATIONS
+
OFF-SITE 00SE MASS LOSS Continuous (1)
Spike (2)
BREAK WATER STEAM EAB
-LPZ EAB LPZ Main Steam 65,000 lbs 20,000 lbs 1.6 0.54 32 11 Thyroid (Rem) 0.38 0.13 0.38 0.13 Whole Body (Rem)
RWCU 82,000 lbs 1.5 0.52 31 10 Thyroid (Rem) 0.36 0.12 0.36 0.12 Whole Body (Rem)
(1) Continuous - Max. iodine concentration allowed in primary coolant (per T.S.) for continuous operation.
7 (2) Spike - Limit on iodine concentration for spiking (per T.S.) for limited operation.
REACTOR BUILDING EEQ PROFILE MASS LOSS TOTAL ENERGY PEAK PEAK BREAK WATER STEAM RELEASE PRESSURE TEMPERATURE 6
1.C. Steam Line 73,158 lbs 7.753 lbm 51.51 x 10 BTU 15.2 psia 213*F at 0.25 sec at 19 sec.
6 RWCU 82,000 45.58 x 10 BTU Bounded By Above