ML051430323

Technical Specification Pages Re Changes Surveillance Requirement (SR) 3.8.1.3 on Diesel Generator Surveillances

ML051430323
Person / Time
Site:	Peach Bottom
Issue date:	05/20/2005
From:	NRC/NRR/DLPM
To:
References
Download: ML051430323 (10)

Text

AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.3 --------- NOTES------------------

1. DG loadings may include gradual loading as recommended by the manufacturer.

2. Momentary transients outside the load range do not invalidate this test.

3. This Surveillance shall be conducted on only one DG at a time.

i

4. This SR shall be preceded by and immediately follow, without shutdown, a successful performance of SR 3.8.1.2 or SR 3.8.1.7.

S. A single test will satisfy this Surveillance for both units,.with synchronization to the Unit 2 4 kV emergency bus for one periodic test and synchronization to the Unit 3 4 kV emergency bus during the next periodic test. However, if the test is not performed on Unit 3, then the test shall be performed synchronized to the Unit 2 4 kV emergency bus.

Verify each DG is synchronized and loaded 31 days and operates for 2 60 minutes at a load 2 2400 kW and s 2800 kW. I SR 3.8.1.4 Verify each day tank contains > 250 gal of 31 days fuel oil.

SR 3.8.1.5 Check for and remove accumulated water from 31 days each day tank.

(continued)

PBAPS UNIT 2 3.8-8 Amendment No. 253

AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE 1 FREQUENCY SR 3.8.1.9 -- ----- NOTES--------------------

1. If performed with the DG synchronized with offsite power, it shall be performed at a power factor 5 0.89.

2. A single test at the specified Frequency will satisfy this

- Surveillance Uor both units.

Verify each DG rejects a load greater than 24 months or equal to its associated single largest post-accident load, and:

a. Following load rejection, the

• frequency is s 66.75 Hz;

b. Within 1.8 seconds following load rejection, the voltage is 2 3750 V and s 4570 V. and after steady state conditions are reached, maintains voltage 2 4160 V and s 4400 V; and

c. Within 2.4 seconds following load rejection, the frequency is 2 58.8 Hz and s 61.2 Hz.

1*

SR 3.8.1.10 ----- NOTE-----:----....-....

A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG operating at a power factor 24 months s 0.89 does not trip and voltage is maintained s 5230 V during and following a load rejection of 2 2400 kW and

• 2800 kW. I (continued)

PBAPS UNIT 2 3.8-10 Amendment No. 253

AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.14 ------------ NOTES-------------------

1. Momentary transients outside the load and power factor ranges do not invalidate this test.

2. If grid conditions do not permit, the power factor limit is not required to be met. Under this condition the power factor-shall be maintained as close to the limit as practicable.

3. A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG operating at a power factor 24 months s 0.89 operates for 2 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s:

a. For : 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded 2 2800 kW and S 3000 kW; and

b. For the remaining hours of the test loaded 2 2400 kW and s 2800 kW. I (continued)

PBAPS UNIT 2 3.8-14 Amendment No. 253

AC Sources-Operating 3.8.1 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY 4

SR 3.8.1.15 - - ---------- NOTES-------------------

1. This Surveillance shall be performed within 5 minutes of shutting down the DG after the DG has operated Z 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded 2 2400 kW and s 2800 kW. I Momentary transients outside of load range do not invalidate this test.

2. All DG starts may be preceded by an engine prelube period.

3. A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG starts and achieves, in 24 months

• 10 seconds, voltage > 4160 V and frequency . 58.8 Hz, and after steady state conditions are reached, maintains voltage 2 4160 V and s 4400 V and frequency 2 58.8 Hz and s 61.2 Hz.

(continued)

PBAPS UNIT 2 3 .8-15 Amendment No. 253

AC Sources-Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.14 REQUIREMENTS (continued) Consistent with Regulatory Guide 1.9 (Ref. 3),

paragraph C.2.2.9, this Surveillance requires demonstration that the DGs can start and run continuously at full load capability for an.interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

However, load values may deviate from the Regulatory Guide such that the DG operates for 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> at a load approximately equivalent to 92% to 108X of the continuous duty rating of the DG, and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of which is at a load approximately equivalent to 108X to 115% of the continuous duty rating of the DG. The DG starts for this Surveillance can be performed either from standby or hot conditions. The provisions for prelube and warmup, discussed in SR 3.8.1.2, and for gradual loading, discussed in SR 3.8.1.3, are applicable to this SR.

This Surveillance verifies, indirectly, that the DGs are capable of synchronizing and accepting loads equivalent to post accident loads. The DGs are tested at a load approximately equivalent to their continuous duty rating, even though the post accident loads exceed the continuous rating. This is acceptable because regular surveillance testing at post accident loads is injurious to the DG1 and imprudent because the same level of assurance in the ability of the DG to provide post accident loads can be developed by monitoring engine parameters during surveillance testing.

The values of the testing parameters can then be qualitatively compared to expected values at post accident engine loads. In making this comparison it is necessary to consider the engine parameters as interrelated indicators of remaining DG capacity, rather than independent indicators.

The important engine parameters to be considered in making this comparison include, fuel rack position, scavenging air pressure, exhaust temperature and pressure, engine output, jacket water temperature, and lube oil temperature. With the DG operating at or near continuous rating and the observed values of the above parameters less than expected.

post accident values, a qualitative extrapolation which shows the OG is capable of accepting post accident loads can be made without requiring detrimental testing.

In order to ensure'that the DG is tested under load conditions that are as close to design conditions as possible, testing must be performed using a power factor

• 0.89. This power factor is chosen to be representative of the actual design basis inductive loading that the DG could (continued)

PBAPS UNIT 2 B 3.8-31 Revision No. 253

AC Sources-Operating 3.8.1 SURVENILANCE REOUTREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.3 -------------------NOTES-------------------

1. DG loadings may include gradual loading as recommended by the manufacturer.

2. Momentary transients outside the load range do not invalidate this test.

3. This Surveillance shall be conducted on only one DG at a time.

4. This SR shall be preceded by and immediately follow, without shutdown, a successful performance of SR 3.8.1.2 or SR 3.8.1.7.

5. A single test will satisfy this Surveillance for both units, with synchronization to the Unit 3 4 kV emergency bus for one periodic test and synchronization to the Unit 2 4 kV emergency bus during the next periodic test. However, if the test is not performed on Unit 2, then the test shall be performed synchronized to the Unit 3 4 kV emergency bus.

Verify each'DG is synchronized and loaded 31 days and operates for 2 60 minutes at a load 2 2400 kW and s 2800 kW. I SR 3.8.1.4 Verify each day tank contains - 250 gal of 31 days fuel oil.

SR 3.8.1.5 Check for and remove accumulated water from 31 days each day tank. '

(continued)

PBAPS UNIT 3 3.8-8 Amendment No. 256

AC Sources-Operating 3.8.1 SURVEILLANCE REOUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.9 ------------- NOTES--------------------

1. If performed with the DG synchronized with offsite power, it shall be performed at a power factor < 0.89.

2. A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG rejects a load greater than 24 months or e.qual to its associated single largest post-accident load, and:

a. Following load rejection, the frequency is s 66.75 Hz;

b. Within 1.8 seconds following load rejection, the voltage is 2 3750 V and s 4570 V, and after steady state conditions are reached, maintains voltage 2 4160 V and 5 4400 V; and

c. Within 2.4 seconds following load rejection, the frequency is 2 58.8 Hz and s 61.2 Hz.

SR 3.8.1.10 ------------------ NOTE---------------------

A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG operating at a power factor 24 months s 0.89 does not trip and voltage is maintained s 5230 V during and following a load rejection of 2 2400 kW and

• 2800 kW. I (continued)

PBAPS UNIT 3 3.8-10 Amendment No. 256

AC Sources-Operating 3.8.1 SURVEILLANCE REOIITREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.14 -------------------NOTES--------------

1. Momentary transients outside the load and power factor ranges do not invalidate this test.

2. If grid conditions do not permit, the power factor limit is not required to be met. Under this condition the power factor shall be maintained as close to the limit as practicable.

3. A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG operating at a power factor 24 months s 0.89 operates for 2 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s:

a. For 2 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded ; 2800 kW and 5 3000 kW; and

b. For the remaining hours of the test loaded 2 2400 kW and s 2800 kW. I (continued)

PBAPS UNIT 3 3.8-14 Amendment No. 256

AC Sources-Operating 3.8.1 SURVEILLANCE REOUITREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.1.15 NOTES-

1. This Surveillance shall be performed within 5 minutes of shutting down the DG after the DG has operated 2 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> loaded 2 2400 kW and : 2800 kW. I Momentary transients outside of load range do not invalidate this test.

2. All DG starts may be preceded by an engine prelube period.

3. A single test at the specified Frequency will satisfy this Surveillance for both units.

Verify each DG starts and achieves, in 24 months.

s 10 seconds,.voltage 2 4160 V and frequency 2 58.8 Hz, and after steady state conditions are reached, maintains voltage 2 4160 V and s 4400 V and frequency

Ž 58.8 Hz-and < 61.2 Hz.

(continued)

PBAPS UNIT 3 3.8-15 Amendment No. 256

I AC Sources-Operating B 3.8.1 BASES SURVEILLANCE SR 3.8.1.14 REQUIREMENTS (continued) Consistent with Regulatory Guide 1.9 (Ref. 3),

paragraph C.2.2.9, this Surveillance requires demonstration that the DGs can start and run continuously at full load capability for an interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

However, load values may deviate from the Regulatory Guide such that the OG operates for 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> at a load approximately equivalent to 92% to 108% of the continuous duty rating of the DG, and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of which is at a load approximately equivalent to 108% to 115% of the continuous duty rating of the DG. The DG starts for this Surveillance can be performed either from standby or hot conditions. The provisions for prelube and warmup, discussed in SR 3.8.1.2, and for gradual loading, discussed in SR 3.8.1.3, are applicable to this SR.

This Surveillance verifies, indirectly, that the DGs are capable of synchronizing and accepting loads equivalent to.

post accident loads. The DGs are tested at a load approximately equivalent to their continuous duty rating, even though the post accident loads exceed the continuous rating. This is acceptable because regular surveillance testing at post accident loads is injurious to the DG, and imprudent because the same level of assurance in the ability of the OG to provide post accident loads can be developed by monitoring engine parameters during surveillance testing.

The values of the testing parameters can then be qualitatively compared to expected values at post accident engine loads. In making this comparison it is necessary to consider the engine parameters as interrelated indicators of remaining OG capacity, rather than independent indicators.

The important engine parameters to be considered in making this comparison include, fuel rack position, scavenging air pressure, exhaust temperature and pressure, engine output, jacket water temperature, and lube oil temperature. With the DG operating at or near continuous rating and the observed values of the above parameters less than expected post accident values, a qualitative extrapolation which shows the DG is capable of accepting post adcident loads can be made without requiring detrimental testing.

In order to ensure that the DG is tested under load conditions that are as close to design conditions as possible, testing must be performed using a power factor s 0.89. This power factor is chosen to be representative of the actual design basis inductive loading that the DG could (continued)

PBAPS UNIT 3 B 3.8-31 Revision No. 256