ML17341A431
| ML17341A431 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 08/03/1981 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| Shared Package | |
| ML17341A432 | List: |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR NUDOCS 8108170046 | |
| Download: ML17341A431 (26) | |
Text
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Docket Hos. 50-250 and 50-251 0<
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Dr. Robert. E. Uhrig, Vice President 4'j.j Advancdd Systems and Technology 9
40@ 0 Florida Power and Light Company;...
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Ip Post Office Box 529100 tliami, Florida 33152
Dear Dr. Uhgig:
Subject:
Information Request Regarding Station Blackout, Unresolved Safety Issue A-44, Turkey Point Nuclear Generating Units 3 and 4 The HRC staff is currently addressing Unresolved Safety Issue (USI)
A-44, Station Blackout.
The purpose of this work is to establish the safety significance of an event resulting in a loss of all alternating current power and, if significant, to consider the need for any specific changes.
Over the past several years information requests have been forwarded.which requested information that is being used in the USI analysis.
Your interest and cooperation in the past have been appreciated.
At this time the USI A-44 effort is being directed toward determining the reliability of the onsite standby diesel generators.
The enclosed questionnaire has been prepared to provide accurate operating experience to serve as a basis for such a determination.
Itore specifically, its purpose is to obtain more detai'ied data than were available in previous diesel generator studies such as AEC-OOE-ES-002, HUREG/CR-0660, and HUREG/CR-1362.
The questionnaire (enclosure
- 1) requests information in tabular form and solicits data for the years 1976 through 1980, inclusive.
There are four tables enclosed:
(1) Diesel Generator Operations Data, (2) Diesel Generator Scheduled Down Time Record, (3) Diesel Generator Unscheduled Down Time Record, and (4) Onsite Emergency Diesel Generator and Auxiliary Equipment Modification Record.
Also enclosed are examples of completed tables as well as a clarification of what should be entered.
Please note that, although it may appear that only Licensee Event Report (LER) information is sought, data on all diesel generator malfunctions, independent of whether an LER was prepared, is requested.
Please find enclosed LER documentation (enclosure
- 2) presently docke'ted for your facility.
You are requested to review these and to indicate if there are other reports which have not been enclosed.
Finally, please find enclosed a copy of the appropriate portions of your response
'(enclosure OFFICES SURNAME$
DATE$
II'208270046 820803j
,PDR,.ADOCK OS0002SO,,;.
F PDR' NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USG PO: 1981~5-960
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Dr. Robert E. Uhrig AUG 3 198f
- 3) to our letter of flarch 6, 1978 which requested
- related, but different,
=
information.
This is being forwarded for your information only and should aid in preparing Tables 1 through 4.
In consideration of the time and effort necessary to obtain this information, the completion of Table 4 should be considered voluntary.
However, it should be noted that if operational and hardware modifications are not identified, the positive or negative influence of these features on emergency alternating current power reliability may be lost in the evaluation of the data.
The expected effect is that our generic reliability estimates may be lower than that which actually exists.
The above information is requested in accordance with Sections 103.b.(3) and 161.c of the Atomic Energy Act of 1954, as amended.
To meet our schedule requirements for the resolution of USI A-44 and to incorporate as much. real experience as possible into the reliability model for emergency power systems, it is requested that your response be provided within 120 days of the receipt of this letter.
However, if this schedule is inconsistent with priority requirements for other licensing work, please provide us with your proposed date of response within 30 days.
He plan to complete our analysis of this data by February 1982.
Your data should be provided by that time so that an accurate assessment of onsite alternating current power sources can be made.
. Steven A. Varga, Chief Operating Reactors Branch 81 Division of Licensing Mr. P; Baranowsky has been designated Task Manager for USI A-44.
Should you have any questions, please feel free to contact him at (301) 443-5921.
Your time and efforts are appreciated.
DISTRI BUTION 50-250/251 Sincerely,,
NRC
& Local PDRs S.
Varga TERA GIB R'eading C. Parri sh tjzSBi~l Sim ORB81 Reading I&E (3}
D. Eisenhut ACRS,.(16}
R. Purple J.
Heltemes J.
Roe OELD T. Novak T. Murley
Enclosures:
F. Schroeder As Stated K. Kniel P. Norian cc:
w/enclosures
. P.
Baranowsky See next page. J. Butts 50
- <<4 I
This request for information was approved by the Office of Management and Budget under clearance number 3150-0067 which expires May 31, 1983.
Comments on burden and dupl-ication may be directed to the Office of Management and Budget, Washington, D. C.
20503.
OFFICE N SURNAME$
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Robert E. Uhrig Florida.Power and Light Company cc:
Nr.. Robert Lowenstein, Esquire Lowenstein,
- Newman, Reis and Axelrad 1025 Connecti'cut 'Avenue, 'N.W.
Suite 1214 Washington, D.
C'.
20036 Environmental; and Urban Affairs Library Florida In'ternational University Niami, Florida 33199 Nr. Norman, A. Coll:, Esquire
- Steel, Hector,and Davis 1400 Southeast'First National Bank Building Miami, Florida 33131 Nr. Henry Yaeger, Plant Nanager Turkey,Point, Plant Florida Power and L'ight Company P. 0.
Box 013100 Miami, Florida 33101 Nr. Jack Shreve Office, of the 'Public Counsel Room 4, Holland Building Tallahassee, Florida 32304 Administrator Department of Environmental Regulation Power Plant Siting Section State of.Florida 2600, Blair Stone Road'allahassee, Florida 32301 Resident Inspector Tur'key Point Nuclear Generating Station U. S. Nuclear Regulatory Commission Post Office Box 1207 Homestead, Florida 33030
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TAI)LI> 1 Diesel Generator Operations Dntn Caleddnr Year 19 Enclosure 1 Page I
Via>>t Hnvie Unit Ho.
Reason for DG Operation, 6 ncheduled Durntio>> of R>>n Teclt ~ Spec Rcq'd Test DG No.
'lumber of Starts IIumber ol I'a floret Percent I.ondlng of DG KW Duration of Run llcfore Stop For I'.ncl>
DG Fnilure Identification of Fnilurc
. Refer to attacl>cd I.I'.Rs or Tal>lc '3 DG Actual Demand Starts not for Testing Hiscellaneous Tests (Specify Type)
TA111.1'.
2 Diesel Generator Sclicdiilcd Downtime Record Calendar Year 19 Enclosure 1 Page 2
I Plant Hamc Unit Ho.
Reason for Downtime Reactor sliutdow>>
llours of Downtime Rca c to r no t sl>u td own Comments Sclieduled
>laintenance Time DG is unavailable for emergency service because of required tests
'I'AIII.E 3 l)iesel Ccncrator llnsche<lu1c<l I)owntlme Record Calend<<r Year 1<)
I'.nclosure I Page 3
Plant Name llnit No.
I.ER Abstract N<
(Refer to attcl ed I.ER Abstra<:I Downtime llours Total Ilours Crouble- 'arts, l)el - Repair/
shoot lrihvar sec t~alacc
.omments
any o the reporte ai urea wou not have been a
failure under emergency conditions, 'please explain here'.
Refer to attaclicd 1.ERs or the failures listed in Table l.-
'I'hIII.I Onalte I:emerge>>cy Dl.e el Generator and his>I11I ary Equipment Hodification Itecord Enclosure 1 Page 4
I'lant Nam<<
Uni.t No.
Equipment or procedure modifJ.ed Date of Mod.
Rcaoon or Modification and Deaired Improvement Description of Modification
E sure 1 Pagh 5
TABLE ENTRIES EXPLANATION/CL'ARIFICATION Table l Reason for DG Operation and Scheduled Duration of Run:
This column contains the different categories of diesel generator operation.
The categories
.are structured such that the start and run conditions are similar for all of the tests in a category.
In this column, enter the scheduled run duration for each of the test -categories.
Also enter the number of diesel generator starts that are done for each type of test.
For example, if on the monthly test there is one start from the local con-trols and one start from the remote controls, tne number of starts per test is two.
Zf two or more diesels are started simultaneously for any reason, please record it as a multiple start.
DG No.:
Enter each diesel generator's identification number in this column as shown in the example.
Number of Starts:
Enter the sum of the successful and unsuccessful start attempts for each catego~.
If there are several starts for each test, include.all of them,, but be certain to record the number of starts per test in column one.
Number of Failures:
Enter the sum of the failures for each category.
A fa.'lure is counted if the objectives of the test are'not achieved.
A subsystem 'failure that does not cause failure of the diesel generator system i's not counted as a failure. If the diesel generator did not start, run, and load as required oy the test, a failure should be recorded.
Howe'.er, if the diesel generator would nave supplied power
'n some capacity for an emergency, please explain in Table 3.."or exa pie, if tne diesel started on the second attempt or t'e diesel-was tripped to repair a m'nor oil leak that you'd not have been a
problem in an emergency, this should be noted in Table 3.
Percent Loading of DG (K'~'):
Enter the percentage that the diesel is loaded for each category.
The continuous kilowatt rat-ng is considered to oe 100%.
Duration of Run Before Stop for each DG Failure:
Record the run-time for each failure.
Zf the diesel failed to start,,
the run-time would
.be 0 min.
Identification of Failures:
Attached to this questionnaire are abstracts of tne LWs related'o the diesel generators The abstracts are numbered starting with one.
Refer to this number to identify the failures, but if there was a failure for which there 'is no abstract,,assign the failure a number and include it in Table 3.
Table 2
Reason for DoTwtime:
Enter in this column the categories of schedule main-tenance that make the diesel generator unavailable for emergency service.
If the diesel generator is unavailable for emergency service during surveillance testing, report that also.
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Encl re 1 Page 6,
Table
- 2. /wont'd)
Hours of Downtime:
Enter the number of hours that the diesel generator is unavailable for emergency service.
Report the hours under the column reactor shutdown or reactor not shutdown as appropriate.
Comments:
Comment on time to return to service after maintenance has
- begun, or other pertinent information.
~Table LER Abstract No. (Refer to attached LER Abstracts):
The attached LEZs are numbered starting from one.
Refer to this Li& number in column one.
Each LER abstract should have an entry in this table.
If there was a failure not included in the attached abstracts, please assign it a number and enter it in this table.
Downtime Hours:
Enter the number of hours that the diesel generator is unavailable for emergency service.
Subdivide these total hours into troubleshooting, parts delivery, and repair or replacement.
Comments:
Use this column to comment, on the downtime,and the failure.
If the reported'ailure was only a technical specification violation, bu would not be a complete failure of the diesel generator to supply power or would only be a delay, please elaborate in this column.
Table 4
Equi"ment or procedure modified:
List in this column the equipment or procedures related to the emergency onsite power system that have been moc'ed since 'the reactor became crit'cal.
Date of Mod.:
Enter the date that the modif"cat.on.=as completed.
Reason for 'Hodification and Desired Improvement:
Report the reason or the modificat'on and the desired or observed improvement in the system.
Description of Modification:
Briefly describe what modificat.'on was made.
TAIII.E 1 (Snmp3,e)
Diesel Gcllcr 0 tot Ope'Inc iolls Dot II Calendar Year i976 Enclosure I I'ge 7
plnnL'aina ~xxx Unit tlo.
1 b
2 Reason or DG Opera tion, b sct>eduled Durntion of Run Tech. Spec'tcq d Teat Honti)ly Surveillance (I hour)
(I start/test)
DG tlo.
Number.
of Stnrta 12 I'2 12
~
'lumb c r of Poilus cs 0
Percent I.onding of DG KN) 100 100 100 Durntion of Run Itefore Stop I'or Edcli DG I'ailurc 30 min' min 0 min Identification of. Failures Refer to attached IERs or Table.3 LER 8 1 b
4 LER 82 Refueling Outage (l2 hours)
(I start/test) 0 0
100 100 100 1 I>our IER J3 Hl.sc. Tecti Spec lteq ',d Tes ts (Start Only)
(I start/test) 0 100 100 100 Table 3 No 9
DG Actual Demand Stnrts not for Testing SIhS Signal (I hour) 0 0
0 Multi le start of 3 DGs Miscellaneous Tests (Specify Type)
Verify Repairs (not full test)
(S tort Only) 6 0
0 0
0 0
0 min Table 3
lf 10
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Thl)I.L' (Sample)
Diesel Generator Sclicdulcd Downtime Record Calcndnr Year 19 Fnclosure 1 I'age 8
Plant Name Unit Ilo.,
Reason for Downtime Scheduled Haintcnance Reactor sliutdown 3
DI:E DP DC DG Ilours of Downtlmc Reactor not shutdown Comments Preventive Haintenance Semi-<annual 6
Annual 24 Equipment Hodification Hodified lube oil on each diesel, Diesels down at different times.
Time DG is unavailable for emergency servic because of required
~ tests Down I> hrs per test Diesel cannot be automatically started during test or for tliree hours afterw'ards
TAIII.I'. 3 (Sample)
Diesel Cencrntor llnnclrcrlrrlerl Downtime Record Calendar Yenl 19 I
Hnclosure 1 Page 9
I'1nnt llnnc unit !lo.
1t2',
I,I'.IL Abstract Ni (Rcfcr to nttcl crl LER hb trncr Downtirlr'e llorrra Total
'I'roublc- 'nrta,Del a) llonrn n~hnotin
~lvct ctc IIe Ir nit/
l~c>inc c Yommerrta any o
t rc rcportc n
urea wou not lravc becb a
fnilure under emergency conditions, please cxplnirr lrerc.
Rcfcr to attaclred. LERs or tire failures listed in Table'.
1 2
3 4
5 6
7 0
IIo Li!R 9
10 lr 3
l2
,0.
0 0
0 0
0 0
1 0.5 1
0 0
0 0
0 0
0 1
1 10 0
0 0
0 0
0 0
2 1.5 0
0 0
0 0
0 0
Diesel started in 15 acc instead of required 10 aec Secorulary air pressure low.
Primary air satisfactory; Secondary air pressure low.
Primary air satisfactory.
Diesel started in 20 sec instead of required 10 sec.
False DC start siI,naln DG satisfactqry Reqrrircd DG starts after tire failure of one diesel.
Starts to verify repairs.
~
~
I
ThBLE I<
(Sample)
Onsite Emergency Diesel Generator and Auxiliary Equips<ent Modification Record Enclosure 1 Page 10 Plant Name Unit No.
~
Equipment or procedure modified Date of Mod.
Reason for, Modification and Desired Improve<A<int Description of Modification Lube oil system 2/76 Improve turb'o charger lubrication for emergency starts.
Soak-l~ack. pump was removed and replaced with a continuous lube oil pump.
New puma also continuously lubricates the crankshaft.
Relay cabinets 1/78 Prevent dirt from fouling rela'y contacts'abinet doors with gaskets were installed.
Instrument Relocation 6/79 Eliminate vibration damage to instruments Control and monitoring instrument panel was relocated from the engine ski'ds to a free standing panel mounted on the engine room floor.
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Enclosure 2
v PAGE 555
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AN OP:RATQR DETECTED A RADIATOR TUBE LEAK QN Tt tE A Er(ERGENCY D IESEL GENERATOR
( EDG) e THE RADIATOR AND OTHER UhRELATLD:DG COMPO!<<Ft<<TS WERE REPAIRED ~
THE EDG WAS TESTED AND R "7'VRt<<ED TQ SERV ICE WITHIN 45 HOURS.
DURING THE PERIOD THE A
EDG W*S I3UT OF SERV ICE.~
THE b EDG WAS VER IF I ED OPERABLE AND A VAILABL' A S Ir'i IL<t>> OCCURRENCE QF A
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ItiVEST ICATION RcVEALFD A CRACKcD N IPPL IN TI c: FUcL LINE TG THE FUEL PUMP CAUS ING FUEL S 1'ARVAT ION s THE:D I FSEL WAS TESTED AND R" TURNED TO
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