ML19331D356
| ML19331D356 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 08/26/1980 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19331D352 | List: |
| References | |
| NUDOCS 8009020074 | |
| Download: ML19331D356 (5) | |
Text
('s E!! CLOSURE 1 V
PROPOSED TECHNICAL SPECIFICATION CHANGES BROWNS FERRY flUCLEAR PLANT Uf!IT 3 O
8 00902007f
1 LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS
- 3. 5 CORE AND,_COUTMEMEUT 4.5 CORE AND Cot 7PAINMENT CCOLING CCCLING SY F.T".'dS SYSTEMS 2.
During reactor power 2.
a.
If no more than operation, RRRSW two RHRSW pumps pumps must be are inoperable, operable and assigned increased to service as surveillance is indicated below for not required.
the specified time limits.
b.
When three RERSW pumps are inoperable, the TIME MINIMUM remaining pumps, LIMIT SERVICE ASSIGNMENT associated (DAYS)
RHRSW EECW**
essential control valves, Indefinite 7*
3*
and associated diesel 30 7* or 6***
2* or 3***
generators shall be operated 7
6*
2*
weekly.
c.
When four RHRSW
inoperable, the remaining pumps,
control valves, and associated
- Nine pumps must be operable.
diesel Either configuration is acceptable:
generators shall 7 and 2 or 6 and 3.
be operated daily.
3.
During power operation, both RHRSW 3.
Routine surveillance pumps B1 and B2 for these pumps is normally or specified in 4.5.C.1.
alternately assigned to the RHR heat exchanger header supplying the standby coolant supply connection must be operable; except as specified in 3.5.c.4 and 3.5.C.5 below.
156
e.
LI!1ITI'iG CONDITIONS FOR OPEPATION SURVEILLANCE REQUIRDENTS 3.5 CORE AND C0!.TAINMENT 4.5 CORS AND CgNTA_INMENT cccLJ1;g COOLING SYSTE!!S SYSTEMS 4.
One of the B1 or B2 When it is determined RHRSW pumps assigned t that the B1 or B2 the RHR heat exchanger RHRSW pump is inoperable at a time supplying the standby coolant supply connection when operability is may be inoperable for a required, the period not to exceed Operable RHRSW pump on the same header 30 days provided the and its associated operable pump is diesel generator and aligned to supply the the RHR heat RHR heat exchanger exchanger header and header and the associated essential associated diesel -
control valves shall generator and be demonstrated to be essential control operable immediately valves are operable, and every 15 days thereafter.
5.
The standby coolant supply capability may be inoperable for a period not to exceed ten days.
6.
If specifications 3.5.C.2 through 3.5.C.5 are not met, an orderly shutdown shall be initiated and the unit placed in the cold shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
l' least 2 RHRSW pumps, 7.
There shall be at associated with the selected RHR pumps, aligned for RHR heat exchanger service for each reactor vessel containing irradiated fuel.
f 157 w-n
l
',4 3.5 Basig REFEREMCES 1
Residual Heat Removal System (BFNP FSAR subsection 4.8) 2.
Core Standby Cooling Systems (BFNP FSAR Section 6)
C.
RHR Se rvice Water System and Emercency Ecu'ipment Coolina Water System (EECWS)
There are two EECW headers (north and south) with four automatic starting RHRSW pumps on each header.
All conporents requiring emergency cooling water are fed from both hc iders thus assuring continuity of operation if either header is operable.
Each header alone can handle the flows to all ccmponents.
Two RERSW pumps can supply the full flow requirements of all essential EECW loads for any abnormal or postaccident situation.
There are four RHR heat exchanger headers (A, B, C, D) with one RHR heat exchanger f rom each unit on each header.
There are two RHRSW pumps on each header; one normally assigned to each header (A2, B2, C2, or D2) and one on alternate assignment (A1, B1, C1, or D1).
One RHR heat exchanger header can adequately deliver the flow supplied by both RERSW pumps to any two of the three RHR heat exchangers on the head er.
One RHRSW pump can supply the full flow requirement of one RHR heat exchanger.
Two RHR heat exchangers can more than adequately handle the cooling requirements of one unit in any abnormal or postaccident situation.
The RHR Service Water System was designed as a shared system for three units.
The specification, as written, is conservative when consideration is given to particular pumps being out of service and to possible valving arrangements.
If unusual operating conditions arise such that more pumps are out of service than allowed by this specification, a special case request may be made to the NRC to allcw continued cperation if the actual system cooling requirements can be assured.
Should one of the two RHRSW pumps normally or alternately assigned to the RHR heat exchanger header supplying the standby coolant supply connection become inoperable, an equal capability for long-term fluid makeup to the unit reactor and for cooling of the unit containment remains operable.
Because of the availability of an equal makeup and cooling capability which is demonstrated to be operable immediately 4
and with specified subsequent surveillance, a 30-day repair
{
period is iustified. Should the capability to provide standby coolant supply be lost, a 10-day repair time is justified based on the low probability for ever needing the standby coolant supply,.
170
4 ENCLOSURE 2 JUSTIFICATION This change is requested to allow RHR maintenance without affecting the operating status of other units.
This requested chance brings these specifications into conformance with the provisions of Technical Specification 3.5.B.13 which allows ten-day repair provisions for the cross-connection alignment.
9
r-e ENCLOSURE 1 PROPOSED TECHNICAL SPECIFICATION CHANGES BROWNS FERRY NUCLEAR PLANT UNIT 3 O
e
- sl=
LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.5 core AND CONTAINMENT 4.5 coaE AND cc:7PAIMMENT ccoLING SYSTEMS C _OO_ _L_I _NG___S Y _ST_ _EM_ _S
.g 2.
During reactor power 2.
a.
If no more than operation, RRRSW two RHRSW pumps are inoperable, pumps must be operable and assigned increased to service as surveillance is indicated below for not required.
the specified time limits.
b.
When three RHRSW pumps are inoperable, the TIME MINIMUM remaining pumps, LIMIT SERVICE ASSIGNMENT associated (DAY S)
RERSW
, EECW**
essential control valves, Indefinite 7*
3*
and associated diesel 30 7* or 6***
2* or 3***
generators shall be operated 7
6*
2*
weekly.
c.
When four RERSW
inoperable, the remaining pumps,
control valves, and associated
- *
- Nine pumps must be operable.
diesel Either configuration is acceptable:
generators shall 7 and 2 or 6 and 3.
be operated daily.
3.
During power operation, both RHRSW 3.
Routine surveillance pumps B1 and B2 for these pumps is normally or bpecified in 4.5.C.1.
alternately assigned to the RilR heat exchanger header supplying the standby coolant supply connection must be operable; except as specified in 3.5.c.4 and 3.5.C.5 below.
h 156 e
v
LIMITING CONDITIONS FOR OPERATICN SURVEILLANCE REQUIREMENTS 3.5 CORE AND CO!?PAINMENT
- 4. 5 CORE AND COtEA_IUMENT COCLJ13G COOLING SYSTEMS SYSTEgS 4.
One of the B1 or B2 4.
When it is determined RHRSW pumps assigned t that the B1 or B2 the RHR heat exchanger RHRSW pump is supplying the standby inoperable at a time coolant supply connection when operability is may be inoperable for a required, the period not to exceed operable RHRSW pump on the same header 30 days provided the and its associated operable pump is diesel generator and aligned to supply the the RHR heat RHR heat exchanger exchanger header and header and the associated essential associated diesel -
control valves shall generator and
~
be demonstrated to be essential control operable immediacely valves are operable, and every 15 days thereafter.
5.
The standby coolant supply capability may be inoperable for a period not to exceed ten days.
6.
If specifications 3.5.C.2 through 3.5.C.5 are not met, an orderly shutdown shall be initiated and the unit placed in the cold shutdown condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
l 7.
There shall be at least 2 RHRSW
- sumps, associated with the selected RHR pumps, aligned foc RHR heat exchanger service for each reactor vessel containing irradiated fuel.
157 1
4 3.5 B AS Er.
REFE9ENCES 1.
Residual Heat Removal System (SFNP FSAR subsection 4.8) 2.
Core Standby Cooling Syscems (BFNP FSAR Section 6)
C.
RHR Se rvice Water System and Emercencv Ecu'ipment Coolina Water System (EECWS)
There are two EECW headers (north and south) with four automatic starting RHRSW pumps on each header.
All components requiring emergency cooling water are fed f rom both headers thus assuring continuity of operation if either header is operable.
Each header alone can handle the flows to all ccmponents.
Two RERSW pumps can supply the tull flow requirements of all essential EECW loads for any abnormal or postaccident situation.
There are four RHR heat excnanger headers (A, B, C, D) with one RHR heat exchanger from each unit on each header.
There are two RHRSW pumps on each header; one normally aasigned to each header (A2, B2, C2, or D2) and one on alternate assignment (A1, B1, C1, or D1).
One EJR heat exchanger header can adequately deliver the flow supplied by both RERSW pumps to any two of the three RHR neat exchangers on the head er.
Cne RHRSW pump can supply the full flow requirement of one RER heat exchanger.
Two RER neat exchangers can more than adequately handle the. cooling requirements of cne unit in any abnormal or postaccident situation.
The RHR Service Water System was designed as a shared system for three units.
The specification, as written, is conservative when consideration is given to particular pumps being out of service and to possible valving arrangements.
If unusual operating conditions arise such that more pumps are out of service than allowed by this specification, a special case request may be made to the NEC to allcw continued operaticn if the actual system ocaling requirements can be assured.
Should one of the two RHRSW pumps normally or alternately assigned to the RHR heat exchanger header supplying the standby coolant supply connection become inoperable, an equal capability for long-term fluid makeup to the unit reactor and for cooling of the unit containment remains operable.
Becaus e of the availability of an equal makeup and cooling capability which is demonstrated to be operable immediately and sith specified subsequent surveillance, a 30-day repair period is justified. Should the capability to provide standby coolant supply be lost, a 10-day repair time is justified based on the low probability for ever needing the standby coolant supply;.
170
ENCLOSURE 2
.IUSTIFICATION This charige is requested to allow RHR maintenance without affecting the operating status of other units.
This requested chance brings these specifications into conformance with the provisions of Technical Specification 3.5.B.13 which allows ten-day repair provisions for the cross-connection alignment.
e e
i