ML20127A143
| ML20127A143 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/31/1985 |
| From: | GENERAL PUBLIC UTILITIES CORP. |
| To: | |
| Shared Package | |
| ML20127A123 | List: |
| References | |
| NUDOCS 8508050427 | |
| Download: ML20127A143 (13) | |
Text
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Three Mila Islrnd Nucinr Station, Unit 2 (TMI-2)
Operating License No. DPR-73 Docket No. 50-320 Technical Specification Change Request (TSCR) No. 51 and Recovery Operations Plan Change Request (ROPCR) No. 33 The Licensee requests the attached pages, 3.7-2, 3.7-8, 3.8-1, 3.8-2, 3.8-3, 3.8-4, B3/4.7-1, 4.3-3, 4.7-3, 4.8-1, and 4.8-2 replace the existing pages 3.7-2, 3.7-8, 3.8-1, 3.8-2, 3.8-3, 3.8-4, 83/4.7-1, 4.3-3, 4.7-3, 4.8-1, and 4.8-2 of the TMI-2 Technical Specifications and Recovery Operations Plan.
The attached Safety Evaluation Report (Attachment 1) describes and evaluates changes proposed for simplification of the Technical Specification and Recovery Operations Plan as they relate to the diesel generators and related systems.
1 The purpose of this SER is to more accurately and precisely reflect the requirements for offsite and onsite power sources given the present conditions at TMI-2. The attached SER discusses, in detail, the entire requested change package.
The specific changes requested are:
l Sections 3.7.4, 3/4.7.4, and 4.7.4 - Nuclear Service River Water System l
Delete all requirements for the operability of the Nuclear Service River Water System.
Section 3.7.10 - Fire Suppression Systems Delete requirements for deluge / sprinkler systems associated with the diesel generators.
Sections 3.8.1, 3.8.2, 4.8.1, and Tables 3.8-1 and 3.8 Electrical Power Systems Delete all requirements for availability and operation of the Class IE Diesel Generators Section 4.3 Table 4.3-2 and Section 4.8.2 Deletes requirements for Emergency Buses associated with the Diesel Generators.
Reason for Change The reason for the proposed changes in the Technical Specification and Recovery Operations Plan are discussed in Section 3 of the attached SER.
Safety Evaluation Justifying Change The justification for the proposed changes is presented in Sections 4 and 5 of the attached SER.
8508050427 850731 PDR ADOCK 05000320 P
The justific tion for the proposed del: tion of the Class IE Diss 1 Generators is based on demonstrating that many original safeguard system loads requiring emergency diesel generator backup are no longer required due to the current plant status. It further demonstrates that existing battery backup is sufficient to power remaining vital equipment during the unlikely occurrence of a loss of offsite power.
The justification for deletion of the Nuclear Service River Water System (NSRWS) is based on demonstrating that, subsequent to the deletion of the emergency diesel generators, the NSRWS no longer serves Technical Specification Required Systems.
The justification for deleting fire protection systems associated with the diesel generators is based on demonstrating that, subsequent to the deletion of the emergency diesel generators, the fire protection systems no longer serves Technical Specification Required Systems.
As discussed in Section 7 of the attached SER, none of the proposed changes in Technical Specification Change Request No. 51 constitute a reduction in safety margins or new potential threats to the health and safety of the public.
These changes, therefore, do not constitute a significant hazard as defined by the Interim Final Rule relating to Significant Hazard Considerations.
Amendment Class Pursuant to the reguirements of 10 CFR 170, Licensing Fees, an application fee of $150.00 is attached.
LIMITING CONIDITIONS FOR OPERATION DECAY EAT CLOSED COOLING WATER SYSTEM Technical Specifications Change Request No. 46 requests deletion.
MINI DECAY EAT REMOVAL SYSTEM Technical Specifications Change Request No. 46 requests deletion.
3.7.4 NUCLEAR SERVICE RIVER WATER SYSTEM Deleted THREE MILE ISLAND - UNIT 2 3.7-2 TSCR NO. 51
LIMITING CONIDITIONS FOR OPERATION DELUGE /SPRIELER SYSTEMS 3.7.10.2 The Deluge and/or Sprinkler Systems located in the following areas shall be OPERABLE:
a.
Deleted b.
Deleted c.
Air Intake Tunnel (Deluge - 2 of the 3 zones) d.
Hydrogen Purge Exhaust Filter AH-F-34#
e.
Reactor Building Purge Exhaust Filters AH-F-31A/Bf f.
Control Room Bypass Filter AH-F-5 g.
Deleted h.
Fuel Handling Building Exhaust Filter AH-F-14A/Bf J.
Waste gas disposal filter WDG-F-1 k.
Auxiliary Building exhaust filters AH-F-10A/B/#
1.
Condenser exhaust filters ##
m.
Auxiliary Building backup exhaust filters **
n.
Southeast Storage Facility ***
APPLICABILITY: RECOVERY MODE.
ACTION:
With one or more of the above required deluge and/or sprinkler systems inoperable, establish a roving (at least once per hour) fire watch with backup fire suppression equipment for the unprotected area (s) within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />; restore the system to OPERABLE status within 14 days or, in lieu of any other report required by Specification 6.9.1, prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 within the next 30 days outlining the action taken, the cause of the inoperability and the plans and schedule for restoring the system to OPERABLE status.
- Supply lines may be isolated by one of four manually operated valves and by a manually operated deluge valve at the deluge station mounted on outside
)
of building.
j s
- This facility's Action Statement shall require a roving fire watch once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> instead of once per hour.
- Supply line may be isolated by a single manually operated valve.
- Supply line may be isolated near the standpipe by two manually operated valves.
THREE MILE ISLAND - UNIT 2 3.7-8 TSCR NO. 51
LIMITING CONIDITIONS FOR OPERATION 3.8 ELECTRICAL POWER SYSTEMS 3.8.1 A.C. SOURCES 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:
a.
Two physically independent circuits between the offsite transmission network and the onsite Class lE distribution system.
b.
Deleted APPLICABILITY: RECOVERY MODE ACTION:
a.
With one offsite circuit of the above required A.C. electrical power sources inoperable, verify the operability of the remaining offsite circuit and demonstrate the OPERABILITY of the D.C. bus trains by performing the Surveillance Requirements 4.8.2.2.1 and 4.8.2.3.2.a.4 within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. Restore the full compliment of offsite A.C. electrical power sources to OPERABLE status within 7 days.
b.
With both offsite circuits of the above required A.C. electrical power sources inoperable, restore and circuit within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and restore the second A.C. circuit to operable status within 7 days.
TWEE MILE ISLAND - UNIT 2 3.8-1 TSCR NO. 51
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T H E MILE ISLAND - UNIT 2 3.8-3 TSCR NO. 51
LIMITING CONIDITIONS FOR OPERATION 3.8.2 ONSITE POWER DISTRIBUTION SYSTEMS 3.8.2.1 A.C. DISTRIBUTION 3.8.2.1.a The A.C. electrical busses listed in Section 4.8.2.1.a of the RECOVERY OPERATIONS PLAN shall be OPERABLE and energized with tie breakers open (unless closed in accordance with procedures approved pursuant to Specification 6.8.2) between redundant busses.
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APPLICABILITY: RECOVERY MODE ACTION:
With less than the above conipliment of A.C. busses OPERABLE, restore the inoperable bus to OPERABLE status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
3.8.2.1.b The A.C. electrical busses listed in Section 4.8.2.1.b of the RECOVERY OPERATIONS PLAN shall be OPERABLE and energized.
APPLICABILITY: RECOVERY MODE ACTION:
a.
With any of the above A.C. busses incapable of being supplied by their respective inverter, restore that capability to the affected bus with 7 days.
b.
With any of the above A.C. busses de-energized, restore the inoperable bus to OPERABLE status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
THREE MILE ISLAND - UNIT 2 3.8-4 TSCR NO. 51
3/4.7 PLANT SYSTEMS BASES 3/4.7.1 FEEDWATER SYSTEM Deleted 3/4.7.2 SECOPOARY SERVICES CLOSED COOLING WATER SYSTE'4 Deleted 3/4.7.3 CLOSED CYCLE COOLING WATER SYSTEM 3/4.7.3.1 NUCLEAR SERVICES CLOSED CYCLE COOLING SYSTEM Technical Specifications Change Request No. 46 requests deletion.
3/4.7.3.2 DECAY EAT CLOSED COOLING WATER SYSTEM Technical Specifications Change Request No. 46 requests deletion.
3/4.7.3.3.
MINI DECAY EAT REMOVAL SYSTEM (MDiflS)
Technical Specifications Change Request No. 36 requests deletion.
3/4.7.4 NUCLEAR SERVICE RIVER WATER SYSTEM Deleted 3/4.7.6 FLOOD PROTECTION The limitation on flood protection ensures that facility protective actions
~ ill be taken in the event of flood conditions. The limit of elevation 302 w
Mean Sea Level is based on the maximum elevation at which facility flood control measures provide protection to Safety Related equipment.
d THREE MILE ISLAND - UNIT 2 B 3/4.7-1 TSCR NO. 51
l jl TABLE 4.3-2 m
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ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMENTATION F:
m MINIMUM CHANNEL
~~
E3 TOTAL NO.
CHANNELS CHANNELS CHANNEL CHANNEL FUNCTIONAL ll FUNCTIONAL UNIT OF CHANNELS TO TRIP OPERABLE ACTION CHECK CALIBRATION TEST l_
l.
LOSS OF POWER z
El a.
4.16 kv Emergency Bus Undervoltage na (Loss of Voltage) 1.
Emergency Bus
- 2-lE and 2-2E 2/ Bus 2/ Bus 2/ Bus 1
S R
H ACTION 1
.Hith the number of OPERABLE channels one less than the Total Number of Channels, place the inoperable channel in the tripped condition within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
ENGINEERED SAFETY FEATURE ACUTATION SYSTEMS INSTRUMENTATION TRIP SETPOINTS FUNCTIONAL UNIT TRIP SETPOINT ALLOHABLE VALUES 1.
LOSS OF POWER a.
4.10 kv Emergency Bus Undervoltage (Loss of Voltage) 1.
Emergency Bus #2-1E 2278 169 volts with a 2278 114 volts with a and 2-2E 1.5 1 15 second time delay 1.5 1 2 second time delay 0
8
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SWVEILLANCE REQUIREENTS 4.7.4 NUCLEAR SERVICE RIVER WATER SYSTEM Deleted 4.7.6 FLOOD PROTECTION 4.7.6.1.1 The. water level at the Unit 1 intake structure shall be determined to be within the limit by:
a.
Measurement at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> when the water level is below elevation 301 feet Mean Sea Level USGS datum, b.
Measurement at least once per 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> when the water level is equal to or above elevation 301 feet Mean Sea Level datum.
4.7.6.1.2 The dike surrounding the island and the dike errosion protection shall be:
a.
Inspected at least once per 6 months and within 31 days after every flood which exceeds 485,000 cfs at the Harrisburg gauga. This inspection shall include:
1.
Dike slope and notation of any location where slope is steeper than 2:1.
, 2.
Depressions and notation of their size and location.
3.
Stone degradation and notation of any areas where splitting, spalling or weathering of stone appears excessive.
4.
Vegetation and notation of location, quantity, and type.
5.
Operability of inside and outside gates of the Southeast Drainage Culvert.
THREE MILE ISLAND - UNIT 2 4.7-3 R0PCR NO. 33
SURVEILLANCE REQUIRDENTS 4.8 ELECTRICAL POWER SYSTEMS 4.8.1 A.C. SOURCES 4.8.1.1.1 Each of the required independent circuits between the offsite transmission network and the onsite Class 1E distribution system shall be determined OPERABLE at least once per 7 days by verifying correct breaker
-alignments and indicated power availability.
4.8.1.1.2 DELETED 4.8.1.1.3 DELETED s
j d
THREE MILE ISLANO - UNIT 2 4.8-1 R0PCR NO. 33
SURVEILLANCE REQUIRE >ENTS A.C. SOURCES (Continued) 4.8.1.1.4 Deleted 4.8.2 ONSITE POWER DISTRIBUTION SYSTEMS 4.8.2.1 A.C. DISTRIBUTION 4.8.2.1.a The specified A.C. busses shall be determined OPERABLE with tie breakers open between redundant busses at least once per 7 days by verifying correct breaker alignment and indicated power availability.
4160 Volt Bus 2-lE, 2-2E, 2-3, and 2-4 480 Volt Bus 2-llE, 2-12E, 2-21E, 2-22E, 2-32, 2-35, 2-36, 2-42, 2-45 and 2-46 4.8.2.1.b The specified A.C. busses shall be determined OPERABLE at least once per 7 days by verifying correct breaker alignment and indicated power availatglity.
120 Volt A.C. Vital Bus 2-lV, 2-2V, 2-3V, and 2-4V D.C. DISTRIBUTION 4.8.2.2.1 Each D.C. bus train shall be determined OPERABLE and energized with tie breakers open at least once per 7 days by verifying correct breaker alignment and indicated power availability.
4.8.2.3.2 Each 250/125-volt battery bank and charger shall be demonstrated OPERABLE:
a.
At least once per 7 days by verifying that:
1.
The electrolyte level of each pilot cell is between the minimum and maximum level indication marks.
2.
The pilot cell specific gravity, corrected to 770F and full electroly e level, is greater than or equal to 1.20.
3.
The pilot cell voltage is greater than or equal to 2.13 volts.
4.
The overall battery voltage is greater than or equal to 250/125 volts.
THREE MILE ISLAND - UNIT 2 4.8-2 R0PCR NO. 33