ML18043A961
| ML18043A961 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 08/16/1979 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7908220311 | |
| Download: ML18043A961 (4) | |
Text
consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201 * (517) 788-0550 August 16, 1979 Director, Nuclear Reactor Regulation Att Mr Dennis L Ziemann, Chief Operating Reactors Branch No 2 US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - IE BULLETIN 79-06B RESPONSE UPDATE Our responses to IE Bulletin 79-06B dated June 5, 1979 and June 7, 1979 concerning containment isolation contain errors which require correction.
These errors are as follows:
- 1.
June 5, 1979 submittal, Page 4, Item 3(b):
Fr~m the table listing "Service" and "Actuation," delete Containment Air Sample CIS.
This is a capped line.
Revised page attached as Enclosure (1).
- 2.
June 7, 1979 submittal:
- a.
Item 2 under remarks, delete "Air room purge exhaust may be open during power operation to permit entry of personnel to air room. 11
- b.
Item 16:
Delete entire item.
- c.
Item 17:
Under remarks, change "Closed During Power Operation" to "Normally Open."
Revised pages of table are attached as Enclosure (2).
JJ~tl fott}new-J David P Hoffman Assistant Nuclear Licensing Administrator CC JGKeppler, USNRC
'1908220 3l/
Enclosure (1)
The following lines are those which can transfer liquids and gases to the waste handling system during power operation:
Service
- Containment Vent Header
- Clean Waste Receiver Tanks Vent
- Vacuum Degasifier Pumps Discharge
- Clean Waste Receiver Tanks Recirculating
- Pump Suction
- Clean Waste Receiver Tanks Recirculating
- Pump Discharge
- Clean Waste Receiver Tanks Pumps Su_~ti:o0: __
- Reactor Coolant Letdown
- Primary System Drain Tank Pump Suction
- Primary System Drain Tank Recirculation
- Primary Coolant Pumps Controlled Bleed Of£ Actuation CIS CIS CIS CIS CIS.
CIS CIS CIS CIS CIS 4
- Quench Tank Vapor Sample CIS (c)
Identify the essential lines penetrating the containment; ie, lines which do not have a post-accident safety function yet are important to plant safety.
These lines typically do not receive an automatic isolation signal, or if they do, their isolation is deferred until subsequent signals are received that confirm the existence of an accident condition.
Describe and justify the isolation actuation provisions for these lines.
(Exclude lines associated with the engineered safety features, and lines which are normally closed during operating modes requiring containment integrity and remain closed following an accident).
Response
The following essential lines are not isolated upon receipt.of a containment isolation signal.
Instrument Air:
Compressed air is required after a DBA and the valves are designed to fail open to provide a supply of instrument air to controls inside containment.
(FSAR 9.5.2.1)
- Feedwater:
Required for heat removal.
- Component Cooling Water (CCW) Supply and Return:
CCW is required to permit operation of the PCPs.
At the present time, CCW is isolated upon receipt of SIS.
A modification to the isolation feature of these valves
Penetration Item Class 1
Al 2
Al 3
Cl C2 5
Cl 6
C2 7
C2 8
C2 Service Containment Purge Containment and/or Air Room Purge Exhaust Main Steam Line Isolation Steam Generator Bottom Blowdown Steam Generator Top Blowdown Component Cooling Water Supply Component Cooling Water Return Shield Cooling Surge Tank Condensate
.CONTAINMENT PENETRATIONS AND VALVES
.Valve(s) Type & Actuation 2 Automatic Valves, Closed by Containment I.solation Signal 3 Automatic Valves, in a Series-Parallel Arrangement, Closed by Containment Isola-tion Signal 1 Automatic Check, Closed by Low Steam Generator Pressure 2 Automatic Valves, Closed by Containment Isolation Signal 1 Automatic Valve, Closed by Containment Isolation Signal 1 Automatic Valve Closed by Safety Injection Signal, 1 Check Valve 2 Automatic Valves Closed by Safety Injection Signal 1 Automatic Valve Closed by Containment Isolation Signal, 1 Check Valve Remarks Closed During Power Operation Containment Purge Exhaust Closed During Power Operation.
Normally Open, Missile Protected Normally Closed, Not Missile Protected Normally Open, Missile Protected Normally Open Normally Open Normally Open
i
' l Penetration Item Class 9
C2 10 C2 11 C2 12 C2 13 C2 14 C2 15 C2 Service Containment Vent Clean Waste.Re-ceiver Tank Vent Vacuum Degasifier Pumps Discharge Clean Waste Receiver Tanks Circ Pump Suction Clea.11 Waste Receiver Tanks Circ Pump Discharge Clean Haste Receiver Tanks Pumps Suction Nitrogen 16 (Deleted) 17 18 Bl C2 Reactor Coolant Letdown Primary System Dra~n Tank Pu.'!lp Suction Valve(s) Type & Actuation 2 Automatic Valves Closed by Containment Isolation Signal 2 Automatic Vavles Closed by Containment Isolation Signal 1 Automatic Valve Closed by Containment Isolation Signal, 1 Check Valve 2 Automatic Valves Clos~d by Containment Isolation Signal 1 Automatic Valve Closed by Containment Isolation Signal, 1 Check Valve 2 Automatic Valves Closed by Containment Isolation Signal 1 Automatic Valve Closed by Containment Isolation Signal, 1 Check Valve 1 Automatic Valve Closed by Containment IEolation Signal, 1 Manual Vo.l ve 2 Automatic Va.lves Closed by Containment Isolation Signal 2
Remarks Normally Open Normally Open Normally Open
- Normally Closed Normally Closed I\\)
Normally Closed Normally Closed Normally Open Normally Open