ML20211Q236

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Proposed Tech Specs 3/4.8.1,revised by Relocating 18-month Surveillance to Subject Sdg to Insps IAW Procedures Prepared in Conjunction with Mfg Recommendations to Section 3.8.1.1.4.8 of UFSAR
ML20211Q236
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 09/08/1999
From:
HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20211Q235 List:
References
NUDOCS 9909150023
Download: ML20211Q236 (12)
v • d • e


Text

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! NOC-AE-000630 l Attachment 5 )

ELECTRK:AL POWER SYSTEMS AllAVFil l ANr'F AFOlll AFMFNTR i

l 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the Onsite Class 1E Distribution System shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker
alignments, indicated power availability, and I
b. Demonstrated OPERABLE at least once per 18 months during shutdown by l transferring the unit power supply from the normal circuit to each of the alternate >

circuits.

I 4.8.1.1.2 Each standby diesel generator shall be demonstrated OPERABLE: <2xu)

a. In accordance with the frequency specified in Table 4.8-1-on a STAGGERED TEST BASIS by:
1) Verifying the fuel level in its associated fuel tank,
2) Verifying the diesel starts from standby condition and accelerates to 600 rpm i (nominal) in less than or equal to 10 seconds.( ) The generator voltage and i frequency shall be 4160 416 volts and 60 1.2 Hz within 10 seconds ( ) after i the start signal. The diesel generator shall be started for this test by using one of the following signals:

a) Manual, or b) Simulated loss-of-offsite power by itself, or c) Simulated loss-of-offsite power in conjunction with a Safety injection  ;

test signal, or l d) A Safety injection test signal by itself. i

3) Verifying the generator is synchronized, loaded to 5000 to 5500 kW, and operates with a load of 5000 to 5500 kW for at least 60 minutes, "X8) and
4) Verifying the standby diesel generator is aligned to provide standby power to the associated emergency busses. i
b. At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> by checking for and removing accumulated water from its associated fuel tank;
c. Maintain properties of new ar.d stored fuel oil in accordance with the Fuel Oil Monitoring Program.

SOUTH TEXAS - UNITS 1 & 2 3/4 8-3 Unit 1 - Amendment No. 68,85 Unit 2 - Amendment No. 67,72 9909150023 990908 PDR ADOCK 05000498 p PDR

NOC-AE-000630 Attachment 5 Page 4 of 4 ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. Deleted.
e. At least once per 18 months, during shutdown, by:
1) Deleted M Subjecting the diccc! to en inepcotion in accordance '.""5 procedurec prepered h conjunct!cn "i"" it manufacturcr'c recommend tione for thic c!:cc Of et:ndby cer/ ice;
2) Verifying the generator capability to reject a load of greater than or equal to 785.3 kW while maintaining voltage at 4160 416 volts and frequency at 60 t 4.5 Hz; (dX5)
3) Verifying the generator capability to reject a load of 5500 kW without tripping.

The generator voltage shall not exceed 5262 volts during and following the load rejection;(dX5)

4) Simulating a loss-of offsite power by itself, and:

a) Verifying deenergization of the ESF busses and load shedding from the ESF busses, and b) Verifying the diesel starts on the auto-start signal within 10 seconds, energizes the auto-connected shutdown loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady-state voltage and frequency of the ESF busses shall be maintained at 4160 i 416 volts and 60 t 1.2 Hz during this test.

5) Verifying that on a Safety injection test signal, without loss-of-offsite power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency shall be 4160
  • 416 volts and 60 1.2 Hz within 10 seconds after the auto-start signal; the steady-state generator voltage and frequency shall be maintained within these limits during this test;
6) Simulating a loss-of-offsite power in conjunction with a Safety injection test signal, and:

! a) Verifying deenergization of the ESF busses and load shedding from the ESF busses; b) Verifying the diesel starts on the auto-start signal within 10 seconds, energizes the auto-connected ESF (accident) loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator SOUTH TEXAS - UNITS 1 & 2 3/4 8-4 Unit 1 - Amendment No. 68,85 Unit 2 - Amendment No. 67,72 l

NOC-AE-000630 Attachm ent 6 Page 1 of 3 l

l ATTACHMENT 6 ANNOTATED BASES PAGES

NOC-AE-000630 Attachment 6 Page 2 of 3 Annotated Bases Pages The following Bases pages are annotated with changes. Additions are indicated with bold type, deletions are designated by line through and are indicated by change bars in the right hand column.

Page B 3/4 8-8

NOC-AE-000630 Attachment 6 Page 3 of 3 1 ELECTRICAL POWER SYSTEMS BASES A.C. SOURCES. D.C. SOURCES. and ONSITE POWER DISTRIBUTION (Continued)

SR 4.8.1.1.2.b Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the fuel oil tanks once every 31 days eliminates the necessary environment for bacterial survival. This is the most effective means of controlling microbiological fouling. In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation. Water may come from any of several sources, including condensation, ground water, rain water, contaminated fuel oil, and breakdown of the fuel oil by bacteria.

Frequent checking for and removal of accumulated water minimizes fouling and provides data regarding the watertight integrity of the fuel oil system. The Surveillance Frequencies are established by Regulatory Guide 1.137. This SR is for preventative maintenance. The presence of water does not necessarily represent failure of the SR, provided the accumulated water is removed during the performance of this Surveillance.

SR 4.8.1.1.2.c The requirements will be controlled and administered by the Diesel Fuel Oil Testing Program located in section 6.8 3 of Administrative Controls.

SR 4.8.1.1.2.e.1 Deleted

-This-inspection !c conductedonseScr cyc!c to encure unexpected 4egradation ic discovered, SR 4.8.1.1.2.e.2 Each DG is provided with an engine overspeed trip to prevent damage to the engine. Recovery from the transient caused by the loss of a large load could cause diesel engine overspeed, which, if excessive, might result in a trip of the engine. This Surveillance demonstrates the DG load response characteristics and capability to reject the largest single load (785.3 kW) without exceeding predetermined voltage and frequency. The 18 month Frequency is consistent with the recommendation of Regulatory Guide 1.108.

This SR is modified by two Notes. Note 4 indicates that diesel engine runs for this Surveillance may include gradual loading, as recommended by the manufacturer, so that mechanical stress and wear on the diesel engine are minimized. Note 5 allows the diesel start for this surveillance to be a modified start as stated in SR 4.8.1.1.2.a.2.

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l SOUTH TEXAS - UNITS I & 2 B 3/4 8-8 Unit I- Amendment No. 68,85 Unit 2 - Amendment No. 57,72

NOC-AE-000630 Attachment 7 Page 1 of 4 ATTACHMENT 7 l

TECHNICAL SPECIFICATION AND BASES PAGES WITH PROPOSED CHANGES ]

INCORPORATED 3 I

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  • f NOC-AE-0(X)630 Attachment 7 Page 2 of 4 l Technical Specification and Bases Pages With Proposed Changes j Incorporated l

The following Technical Specification and Bases pages, which incorporate the proposed changes

! in Attachments 5 and 6, are provided for NRC use in review of this submittal.

Page 3/4 8-4 (Page 3 of 4)

Page B 3/4 8-8 (Page 4 of 4)

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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

d. Deleted
e. At least once per 18 months, during shutdown, by:
1) Deleted
2) Verifying the generator capability to reject a load of greater than or equal to 785.3 kW while maintaining voltage at 4160 416 volts and frequency at 601 4.5 Hz; "H5)
3) Verifying the generator capability to reject a load of 5500 kW without tripping.

The generator voltage shall not exceed 5262 volts during and following the load rejection; "X5)

4) Simulating a loss-of-offsite power by itself, and:

a) Verifying deenergization of the ESF busses and load shedding from the ESF busses, and b) Verifying the diesel starts on the auto-start signal within 10 seconds, energizes the auto-connected shutdown loads through the load sequencer and operates for greater than or eaual to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady-state voltage and frequency of the ESF busses shall be maintained at 4160 416 volts and 60 1.2 Hz during this test.

5) Verifying that on a Safety injection test signal, without loss-of-offsite power, the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The generator voltage and frequency i shall be 4160 416 volts and 60
  • 1.2 Hz within 10 seconds after the auto-l start signal; the steady-state generator voltage and frequency shall be maintained within these limits during this test;
6) Simulating a loss-of-offsite power in conjunction with a Safety injection test signal, and:

i a) Verifying deenergization of the ESF busses and load shedding from the ESF busses; b) Verifying the diesel starts on the auto-start signal within 10 seconds, energizes the auto-connected ESF (accident) loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator SOUTH TEXAS - UNITS 1 & 2 3/4 8-4 Unit 1 - Amendment No.

Unit 2 - Amendment No.

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ELECTRICAL POWER SYSTEMS 4 '

BASES l

A.C. SOURCES. D.C. SOURCES. and ONSITE POWER DISTRIBUTION (Continued)

SR 4.8.1.1.2.b Microbiological fouling is a major cause of fuel oil degradation. There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive. Removal of water from the fuel oil tanks once every 31 days eliminates the necessary environment for bacterial survival. This is the most effective means of controlling microbiological fouling. In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation. Water may come from any of several sources, including condensation, ground water, rain water, contaminated fuel oil, and breakdown of the fuel oil by bacteria.

Frequent checking for and removal of accumulated water minimizes fouling and provides data regarding the watertight integrity of the fuel oil system. The Surveillance Frequencies are established by Regulatory Guide 1.137. This SR is for preventative maintenance. The presence of water does not necessarily represent failure of the SR, provided the accumulated water is removed during the performance of this Surveillance.

SR 4.8.1.1.2.c The requirements will be controlled and administered by the Diesel Fuel Oil Testing Program located in section 6.8.3 of Administrative Controls.

SR 4.8.1.1.2.e.1 Deleted SR 4.8.1.1.2.e.2 Each DG is provided with an engine overspeed trip to prevent damage to the engine. Recovery from the transient caused by the loss of a large load could cause diesel engine overspeed, which, if excessive, might result in a trip of the engine. This Surveillance demonstrates the DG load response characteristics and capability to reject the largest single load (785.3 kW) without exceeding predetermined voltage and frequency. The 18 month Frequency is consistent with the recommendation of Regulatory Guide 1.108.

This SR is modified by two Notes. Note 4 indicates that diesel engine runs for this Surveillance may include gradual loading, as recommended by the manufacturer, so that mechanical stress and wear on the diesel engine are minimized. Note 5 allows the diesel start for this surveillance l to be a modified start as stated in SR 4.8.1.1.2.a.2.

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SOUTH TEXAS - UNITS I & 2 8 3/4 8-8 Unit I- Amendment No. l Unit 2 - Amendment No.

NOC-AE-000630 i

Attachment 8 Page 1 of 3 ATTACHMENT 8 PROPOSED UFSAR CHANGE 1

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7 a o NOC-AE-000630 Attachment 8 Page 2 of 3 Proposed UFSAR Change The following UFSAR section markup is provided for information and is annotated with planned changes. Additions are indicated with bold type, deletions are designated by line through and are indicated by change bars in the right hand column.

Item 5 is the information being relocated from Technical Specification Surveillance Requirement 4.8.1.1.2.e.l.

Other indicated changes update this section to reflect cunent station conditions and eliminate a typographical error.

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NOC-AE-000630 Attachment 8 Page 3 of 3 8.3.1.1.4.8 Optimum Emercency Diesel Generator Readiness - To assure optimum emergency DG readiness and availability on demand, South Texas Project Electric Generating Station (STPEGS)is developing has a periodic testing program and a preventive maintenance program. The following requirements wi!! be me: are included:

1. Plant procedures wiH include provisions for loading the DGs to a level that will remove gum and varnish buildup accumulated during periods of no load or light load operation.
2. Periodic surveillance testing w4be is performed in accordance with RG 1.108 with the I exceptions and interpretations in Section 8.3.1.2.10.
3. Diesel generator equipment history records wiM-be are maintained and repair records wiH be are reviewed for repeated failures which would warrant further technical investigation.
4. Upon completion of repairs or maintenance and prior to an actual start, run, and load test in a final equipment check w&be is made to assure that electrical circuits are functional.

l In addition, testing procedures wiH contain instructions to have the DG returned to ready i automatic standby service under the control of the control room operator.

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5. The diesels are subjected to an inspection every 18 months in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service. These inspections may be performed during power l operation provided that two of the three standby diesel generators remain operable

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