ML20042E057
| ML20042E057 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 03/30/1990 |
| From: | Wigginton D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20042E058 | List: |
| References | |
| NUDOCS 9004190214 | |
| Download: ML20042E057 (7) | |
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UNITE D STATES g-NUCLEAR REGULATORY COMMISSION j
WASHINGTON, D. C. 20555 5
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March 30, 1990 Docket No. 50-382.
LICENSEE:= Louisiana Power and Light Company (LP&L)
FACILITY: Waterford Steam Electric Station, Unit No. 3
SUBJECT:
SUMMARY
OF MEETING HELD ON MARCH 13, 1990 WITH LP&L
-TO DISCUSS DIESEL GENERATOR STARTS --REDUCTION PROGRAM On March 13, 1990, the staff met with the licensee at the Waterford site.to-discuss the proposed and alterrative methods to reduce the number of diesel generator starts. The list of attendees is attached as Enclosure 1.
Each diesel generator (DG) is started each month-on a staggered test basis for.
a one hour load run.~
The DGs are also-started three times every two months for Engineered Safety Feature Actuation System (ESFAS) tests. These latter tests assure that all the active components (primarily. relays)iin the protective system work and the affected components go to the desired position; only the DG starts are addressed here. The ESFAS testing at Waterford will start the DG
-in an unprotected mode. i.e., a number of ncn-safety DG trips are bypassed.
The DG must be manually shut down in this test mode if protection of the DG is.
required.
Three al.ternatives were discussed that w'ould help tQ reduce the number of DG starts at Waterford. The ESFAS testing could be performed but with-the DG start air isolated. There are two small valves which could be closed that.
would prevent start air from reaching the cylinders..The DG control air would attempt to start the DG but with no start air to roll the diesel, the DG would not start. Any operation of the DG would now require operator action. An additional unknown with this operation is the effect of.the generator field flashing which would occur. This method was not recommended by the licensee because of required operator action and unknown effects of field flashing on a stationary generatoe.
The second alternative which may be proposed as an interim method involves momentary manual terminatien/ determination bypasses' on a start relay to allow DG speed control to be regained during ESFAS test'ing.
Upon initiation of the ESFAS test, a relay is momentarily bypassed by manual application of leads between terminals and immediately removed as the DG starts. This would test the ESFAS _ relays and the DG start and would provide speed control and protection of the DG. The DG could then be load tested for the-hour run which would count toward the DG start requirements thereby reducing the total number of starts on the DGs. The concern with.this alternative is with the manual operation across the correct terminals and the need to assure the bypass is removed promptly with the DG start. The licensee will examine methods to provide these assurances if the method is further proposed, b
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March 30, 1990 Docket No; 50-382-4 LICENSEE:. Louisiana Power and Light Company:(LP&L)
FACILITY.: Waterford. Steam Electric Station, Unit No. 3
SUBJECT:
SUMMARY
OF MEETING HELD OH MARCH 13, 1990 WITH LP&L TO DISCUSS-DIESEL GENERATOR STARTS - REDUCTION PROGRAM On March.13, 1990, the_ staff met with the licensee.at-the Waterford site to'
~ discuss the proposed and alternative methods to reduce the number of diesel generator starts. The list of attendees is attached as Enclosure 1.
Each diesel generator-(DG)'is-started each month on a staggered test basis for a one hour. load run.
The DGs are also started three times every two months for Engineered Safety Feature Actuation System (ESFAS) tests. These latter tests assure that all the-active components (primarily relays) in the protective system work.and the affected components go to the desired position; only. the' 00 starts are addressed here. The ESFAS testing at Waterford will start the DG in an unprotected. mode, i.e., a number of non-sa_fety DG trips are bypassed.
The DG must be manually shut down in this test mode if protection of the DG.is required.
}
Three al.ternatives were discussed that dould' help.to reduce the number of DG-starts at Waterford.
The ESFAS testing could be performed but with the DG start air isolated.
There are two small valves which could be closed that would prevent start air from reaching the cylinders. The DG control air would attempt to start the DG but with no start air to roll the diesel, the DG would not. start. Any operation of the DG would new require operator action. An 3
additional unknown with this operation is the effect of the generator field flashing which would. occur. This method was not recommended by the licensee-i l
because of required operator action and unknown effects of-field flashing on L
a stationary generator.
The second alternative which may be proposed as an interim method involves momentary manual termination / determination bypasses on a start relay to allow, I
DG speed control to be regained during ESFAS test'ing.
Upon initiation of the ESFAS' test, a relay'.is momentarily bypassed by manual application of leads between terminals and immediately removed as the DG starts.
This would test the ESFAS relays and the DG start and would provide speed control.and protection of the DG. The DG could then be load tested for the hour run which would count toward the DG start requirements thereby reducing the-total number of starts on the DGs. The concern with this alternative is with the manual operation across the correct terminals and the need to assure the bypass is removed l
promptly with the~DG start.
The licensee will examine methods to provide these assurances if'the method is further proposed.
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=l 2-The third alternative involves a design modification of the ESFAS to DG start l
relay arrangement-to provide a completely redundant start circuitry for test i
which will allow DG starts with speed control. The licensee will proceed with L
plans for the modification and will advise the NRC when sufficient information is available for discussion.
-The licensee may also investigate the possibility of extending the frequency L
of ESFAS actuation tests which would also provide an acceptable staggered test L
in conjunction with the DG start / load test. When all of these efforts have l-progressed to a-point where definitive proposals can be discussed, another meeting will.be arranged with the licensee. includes uncontrolled plant drawings of the start relays which were discussed at the meeting.
1 A
David L. Wiggir. ton, Project Manager i
Project Directorate - IV Division of Reactor Projects - III, L
IV, V and Special Projects i
Office of Nuclear Reactor Regulation
Enclosures:
As stated cc w/ enclosure 2:
See next page l
1 l
DISTRIBUTION: w/o enc 1. 2 Docket File w/ encl.2 NRC & Local PDR w/ enc 1.'2.
J. Sniezek PDIV r/f F. Hebdon D. Wigginton w/ enc 1. 2 OGC E. Jordan ACRS(10)
J. Rogge, 17G21 K. Cotton E. Tomlinson J. Stewart J. Joyce S. Butler, RIV UFC
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.....:............:......'n DATE :03/$190
- 03/yd90 OFFICIAL RECORD COPY Document Nane: U3 LTR/76159
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The third alternative. involves a design modification of the ESFAS to DG start relay arrangement to provide a completely redundant start circuitry for test which will allow DG starts with speed control. The licensee will proceed with plans for the modification and will advise the NRC when sufficient information is available for discussion.
The licensee may also investigate the possibility of extending the frequency of ESFAS actuation tests which would also provide an acceptable staggered test in conjunction with the DG start / load test.
When all of these efforts-have progressed to a point where definitive proposals can be discussed, another-meeting will be arranged with the licensee. include > uncontrolled plant drawings of the start relays which were discussed at the meeting.
&? e.> t c 0-p3' David L. Wigginto, Project flanager
Project Directorate - IV Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosures:
As stated cc w/o enclosure 2:
See next page i
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relay arrangement to provide a completely redundant start circuitry for' test which will allow DG starts with speed control. The licensee will proceed with plans for the modification and will advise the NRC when sufficient information is available for discussion.
l The licensee may also investigate the possibility of extending the frequency of ESFAS actuation tests which would also provide an' acceptable staggered test in conjunction with the DG start / load test.
_ hen all of these efforts have W
progressed to a point where definitive proposals can be discussed, another meeting will be arranged with the licensee. includes uncontrolled plant. drawings of the start relays which were discussed at the meeting.
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p'd-David L. Wigginto, Project Manager Project Directorate - IV Division of Reactor Projects - III, l
IV, Y and Special Projects j
Office of Nuclear Reactor Regulation l
Enclosures:
As stated cc w/o enclosure 2:
i See next page
,e.
e Mr. Jerrold G. Dewease Waterford 3 Louisiana Power & Light Company cc:
W. Malcolm Stevenson, Esq.
Regional Administrator, Region IV-Monroe & Leman U.S. Nuclear Regulatory Comission 201 St. Charles Avenue, Suite 3300 Office of Executive Director for t.
New Orleans, Louisiana 70170-3300 Operations 611 Ryan Plaza Drive, Suite 1000-Mr. E. Blake Arlington, Texas 76011 Shaw, Pittman, Potts & Trowbridge 2300 N Street, NW -20037 Nuclear Energy Division l
Mr. William H. Spell, Administrator Washington, D.C.
Department of Environmental Quality l
Resident Inspector /Waterford NPS Post Office Box 14690 Post Office Box 822
-Baton Rouge, Louisiana - 70898 1
Killona, Louisiana 70066 Mr. Ralph T. Lally President, Police Jury
-i Manager of Quality Assurance St. Charles Parish I
Middle South Services, Inc.
Hahnville, Louisiana 70057 Post Office Box 61000 1;
New Orleans, Louisiana 70161 Chairman William A. Cross Louisiana Public Service Commission Bethesda Licensing Office i
One Americar,- Place, Suite 1630 3 Metro Center
-Baton Rouge, Louisiana 70825-1697 Suite 610 1
Bethesda, Maryland 20814 Mr. R. F. Burski Nuclear Safety and Regulatory Affairs Manager Louisiana Power & Light Company 317 Baronne Street Mr. J. G. Dewease t!ew Orleans, Louisiana 70112 Senior Vice President - Nuclear Operations Louisiana Power and Light Company Post Office Box 60340 New Orleans, Louisiana 70160 i
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4o i The third alternative involves a design modification of the ESFAS to DG start relay arrangement to provide a completely redundant start circuitry for test which will allow DG starts with speed control. The' licensee will proceed with plans for the modification and will-advise the NRC when sufficient information.
is available for discussion.
The licensee may also investigate the possibility of extending the frequency -
of ESFAS actuation tests which would also provide an acceptable staggered test in conjunction with the DG start / load test. When all of these efforts have
. progressed to a point where definitive proposals can be discussed, another meeting will be arranged with the licensee. includes uncontrolled' plant drawings of the start relays which were discussed at the meeting.
S David L. Wigginton, Project Manager Project Directorate - IV Division of Reactor Projects. III, IV, V and Special Projects Office of Nuclear Reactor Regulation
Enclosures:
As stated cc w/ enclosure 2:
See next page 3
- h. DISTRIBUTION: w/o encl. 2 Docket; F1]e w/ encl'.~2)
NRC & Local PDR w/ encl. 2 J. Sniezek PDIV-r/f F. Hebdon D. Wigginton w/ encl. 2
~
J. Rogge, 17G21 K. Cotton E. Tomlinson J. Stewart J. Joyce S. Butler, RIV 0FC
- PD47MI
- PD4/P NAME 6... g'.....:___.____:__..________:............:.___......._:..._________:____..___
Eigginton :FHeb i
DATE :03/ W 90
- 03/3c/90
.)FFICIAL RECORD COPY Jocument Name: W3 LTR/76159
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.y DG STARTS March 13. 1990 Name Organization D..Wigginton NRR/PDIV K. R. Cotton NRR/0TSB Ed Tomlinson NRR/0TSB Jim Stewart NRR/I&C Joseph P. Joyce NRR/I&C.
Tim Tullos
- LP&L/0PS' 4
Terry-Brown LP&L/0PS 1
Bob Legere LP&L/PE l
~ Tom Watkins -
LP&L/PE Paul Gropp-Steve Butler
~ LP&L/PE NRC/RIV Dave Rothrock LP&L/LIC Larry ;Leughlin LP&L/LIC i
T. H. Smith LP&L/PE l
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