ML17347B045
| ML17347B045 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 03/24/1989 |
| From: | Norris J Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| TAC-65816, TAC-65817, NUDOCS 8904030383 | |
| Download: ML17347B045 (12) | |
Text
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Docket Nos.
50-250 and 50-251 March 24, 1989 LICENSEE:
Florida Power and Light Company FACILITY:
Turkey Point, Units 3 and 4
SUBJECT:
SUMMARY
OF MEETING WITH FLORIDA POWER AND LIGHT COMPANY TO DISCUSS THE LICENSE AMENDMENT RELATING TO THE TECHNICAL SPECIFICATIONS UPGRADE FOR ELECTRICAL POWER SYSTEMS (TAC NOS.
65816 AND 65817)
A meeting was held at the NRC offices in Rockville, Maryland on February 8, 1989, to discuss proposed the Technical Specifications Upgrade Program relating to the electrical systems for Turkey Point Units 3 and 4.
The specific items discussed are shayn in Attachment 1 to Enclosure 1.
The resolutions arrived at during the meeting are det'ailed in Enclosure 1.
Several items still remained open following the meeting.
They are designated as category (5) in the Attachment 1 to Enclosure l.
Enclosure 2 is the attendance list.
Original signed by Jan A. Norris, Backup Project Manager Project Directorate II-2 Division of Reactor Projects I/II
Enclosures:
1.
Techni cal Input 2.
Attendance List cc w/enclosures:
See next page DISTRIBUTION NRC Iti LPDRs+
J. Sniezek, 12/G/18 PDII-2 Rdg File HBerkow JNorris OGC
- EJordan, MNBB-3302 BGrimes 9/A/2 ACRS(10 RBorchardt, RII AToalston, 8/D/20 JKnight, 8/D/20
- FRosa, 8/D/20 11/F/23
- EAdensam, 14/B/20
- GLainas, 14/H/E/4 BWillson, RII ISUMM23
- LA:PDII-2 DMilier 03/03/89
- SEE PREVIOUS S9040303S3 PDR ADOCK P
P,:
I 2 Jgorr jd 03 ONC RENCE S90324 05000PD
- PM:PDII-2 GEdison 03/22/89 po(
- NRR:SELB FRosa 03/15/89
Sg
,I 1
4
Florida Power 5 Light Company St. Lucie Plant CC:
Mr. Jack Shreve Office of the Public Counsel Room 4, Holland Building Ta 1 lahassee, Florida 32304 Resident Inspector c/o U.S.
NRC 7585 S.
Hwy A1A Jensen Beach, Florida 34957 State Planning 5 Development Clearinghouse Office of Planning 8 Budget Executive Office of the Governor The Capitol Building Tallahassee, Florida 32301 Harold F. Reis, Esq.
Newman 5 Holtzinger 1615 L Street, N.W.
Washington, DC 20036 John T. Butler, Esq.
- Steel, Hector and Davis 4000 Southeast Financ ia 1 Center Miami, Florida 33131-2398 Administrator Depar tment of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Mr. Weldon B. Lewis, County Administrator St.
Lucie County 2300 Virginia Avenue, Room 104 Fort Pierce, Florida 33450 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.
12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Mr. Jacob Daniel Nash Office of Radiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.
Tallahassee, Florida 32399-0700 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Campbell Rich 4626 S.E.
Pi lot Avenue Stuart, Florida 34997 Mr. W. F.
Conway Senior Vice President-Nuclear Nuclear Energy Department Florida Power and Light Company Post Office Box 14000 Juno Beach, Florida 33408-0420
ENCLOSURE 1
TECHNICAL INPUT FOR FEBRUARY NUTES ON L
S The Attachment 1 "Items For Discussion" pertain to FPKL's January 24, 1989 submittal.
They were discussed item by item.
Several items were resolved by agreement to make minor changes to the proposed Technical Specifications (T.S.).
These items have been marked with a (1).
Several items were resolved by agree-ment as to the meaning or intent of the proposed T.S.
These items have been marked with a (2).
Some items are consistent with the present T.S.
and no change is proposed at the present time.
These items have been marked with a (3).
Some items are discussed in the "Bases" section of the proposed T.S.
These items have been marked with a (4).
Items marked with a (5) are open items for which the licensee has agreed to submit further information and/or proposed changes.
These are discussed below.
- However, an understanding of the plant specific power supply is desirable to better understand the open items.
- Thus, some of the power supply characteristics are discussed first.
Tur key Point has two emergency diesel generators, each with a top rating (equivalent to the short time rating defined in IEEE 387) of 3850 kM.
Each diesel generator is shared by Turkey Point Units 3 and 4.
EDG-A supplies power to the 4160 kV Division A busses (Bus 3A and Bus 4A).
EDG-B supplies power to the 4160 kV Division B busses (Bus 3B and Bus 4B).
There are two (double wind-ing secondary) start up transfers.
Startup transformer f3 supplies 3A and 3B.
The winding that supplies 3A also supplies 4A (See sketch on Attachment 2).
Startup transformer f4 supplies 4A and 4B.
The winding that supplies 4A also supplies 3A.
Thus, the A busses have two immediate sources of offsite power, whereas the B busses only have one immediate source of offsite power.
Each startup transformer or EDG has adequate capacity for an ECCS actuation on one unit and a shutdown on the other unit.
The Unit 3 auxiliary transformer has, a double secondary winding supplying busses 3A and 3B.
The Unit 4 auxiliary transformer has a double secondary winding supplying busses 4A and 4B.
In addition to the 4160V A-and B safety busses, the station has 4160V busses 3C and 4C, for Units 3 and 4 respectively, supplying non-safety loads.
The 3C bus has electrical connections (normally interlocked open and capacity limited by reactors) to the 3A and 3B busses (See Attachment 2).
The 4C bus has similar connections to the 4A and 4B busses.
The C busses receive power from two double secondary winding transformers.
Transformer 3C supplies 4160V busses 3C and 4C by its two windings.
Transformer 4C similarly supplies 4160V busses 3C and 4C by its two windings.
The C busses can also receive power from two of five 2500 kW cranking diesels used normally for the fossil fired Units 1 and 2.
The supply to the C busses is limited to 5
MVA by the cable rating.
With the above background information, we now turn to a discussion of the open items pertaining to the proposed electrical system T.S.
changes.
T.S. 3.8.1.1 Action a applies when either startup transformer is inoperable.
The present Turkey Point T.S.
does not require a shutdown for this condition.
The Westinghouse Standard T.S.
(STS) would require a shutdown coaeencing in 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> if the startup transformer is not restored.
The licensee contends that a shutdown is not desirable because a plant shutdown would require natural circulation and intentional reliance on engineered safety features for a non-accident condition.
In view of 4160V Bus C ties to the A and B busses, the staff agreed that a shut-down should not be required for up to 30 days provided surveillances are made to assure the operability of at least two out of five of the black start non-safety grade diesels.
The licensee agreed to submit revised T.S. to incorporate such surveillance, and to require an orderly shutdown of the units if the black start diesels were not available.
T.S. 3.8.1.1 Actioh d applies when one startup transformer and one EDG is inoperable.
The present Turkey Point T.S.
has no provision for this situation.
The standard T.S. would require a shutdown commencing in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> if neither the startup transformer nor the EDG is restored within that time.
The staff agreed that a shutdown would not be required until 7 days (the required shut-down time for an inoperable EDG) provided the surveillance for the black-start diesels are made consistent with the discussion above for T.S. 3..8.1.1 Action a.
T.S. 3.8.1.1 Action e applies when two EDGs are inoperable.
The present Turkey Point T.S.
has no provision for this situation.
The standard T.S. would require shutdown commencing in 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> if neither EDG were restored, and hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
The proposed Turkey Point T.S. would allow 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> for an orderly shutdown of both units.
This is considered to be acceptable by the staff.
However, the proposed Turkey Point T.S. would allow additional time
.for shutdown if both startup transformers were also found to be inoperable.
This was not found to be acceptable.
The licensee agreed to revise and resubmit this T.S. for staff consideration.
T.S. 3.8.1.1 Action f applies when two startup transformers are inoperable.
The present Turkey Point T.S.
has no provision for this situation.
The standard T.S. would require shutdown to commence within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> if neither startup trans-former were restored within that time.
The Turkey Point proposed T.S. would not have required an intentional shutdown for this condition.
The staff found this to be unacceptable.
The licensee has agreed to discuss this with their Management.
T.S. 4.8.1.1.1 Item a4 applies to a surveillance startup and loading of an EDG at 184 day intervals.
The Turkey Point proposed T.S. would allow 10 minutes to complete the loading sequence.
The licensee states that this amount of time is necessary because manual loading is used to obtain sufficient load on the EDG.
The licensee agreed to investigate whether a different loading method could be used to better simulate the emergency sequencing of loads onto the EDG.
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ATTACHMENT 1 TURKEY POINT
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T.S. 3.8.1.1 Action f:
For Mode 1, time limit to restore inoperable (5) startup transformer Time limit to restore second inoperable transformer (5)
Meaning of "This Action applies to both units simultaneously" (1) if only one unit is in Mode 1
Intent of the word "next" in f.3.b (1)
T.S. 3.8.1.2:
For part a.,
meaning of "or one offsite circuit" (2)
Does Action apply to both units simultaneously?
(2)
T.S. 3.8.2.2:
Does Action apply to both units simultaneously?
(2)
T.S. 3.8.3.1:
Do the words "vital section(s)"
have a special (2) significance?
Why aren't vital panels included?
(3)
Why does footnote ***omit MCC 4A? (4)
Why no Action for MCC 4A inoperable?
(4)
Why verify operability of DGs when MCCs are (4) inoperable?
T.S. 3.8.3.2:
Meaning of "associated" 480 volt AC buses (2)
Does Action apply to both units simultaneously?
(2)
T.S. 4.8.1.1.1:
Item a3 - Justification for x624 volts (3)
Item a4 - Justification for "within 10 minutes" for (5) 184 day test
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%3 W Item c - Is this applicable to each diesel2 (2)
Item d - Is this applicable to each diesel7 (2)
Item dna - Is 380kW equal to the largest loads (3)
Justification for +624 volts General Startup tranformer surveillance I)
DG lockout relay surveillance (3
Required minor additions or changes Meaning or intent agreed to by parties Consistent with present T.S.,
no change at this time Discussed in "Bases" section of proposed T.S.
Open items, licensee to supply additional information
ATTACHMENT 2 ILLUSTRATION OF POWER SUPPLY TO 4160V BUS 3A Unit 3 Unit 3 3750kw Start-Up Aux ED -A Transformer Transformer From Unit $4 Start-up Trans f.
To 4A Bus To 3B To 4A Bus To 3B Bus 4160V 3A interl ocked open To 3B Bus 4160V 3C From 3C Transf.
From 4C Transf.
From cranking diesel s Note:
Supply to 4160V busses 38, 4A and 4B similar (See discussion for differences)
ENCLOSURE 2 MEETING BETWEEN FLORIDA POWER AND LIGHT CO%ANY AND NRC STAFF - TURKEY POINT ELECTRICAL POWER SYSTEHS T.S.
February 8, 1989 J. Norris A. Toalston H. Berkow J.
E. Kn)ght F.
Rosa C.
W. Hoon P.
Pace H.
P.
Huba J. Arias, Jr.
R. Hart N.
P. Raldiris AFF ILIATION NRR/P 0II-2 NRR/SELB/D EST NRR/PDII-2 NRR/DEST/SELB NRR/DEST/SELB NRR/DOEA/OTSB FPL -NUC. LIC.
FPL - ENG.
FPL -
PTN FPL -
PTN FPL - JPN