ML20050C741
| ML20050C741 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 10/01/1981 |
| From: | Hunstad A NORTHERN STATES POWER CO. |
| To: | |
| Shared Package | |
| ML20050C738 | List: |
| References | |
| NUDOCS 8204090319 | |
| Download: ML20050C741 (7) | |
Text
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NARRATIVE SLHMARY OF OPERATING EXPERIENCE DOCKET NO. 50- 282 UNIT Prairie Island No.1 DATE 811001 COMPLETED BY A. A. HUNSTAD TELEPHONE 612-388-1121-l MONTH SEPTEMBER 1981 Following the trip on August 31st, the turbine control system was f
repaired and the unit was returned to service at 1644 on September 1st.
The unit was then in coastdown operation until 1801 on September 19th when it was taken off line for the Cycle 6-7 refueling.
Some degradation of steam generator tubes was seen during eddy current -
{
testing (which is not complete).,It is expected about two dozen tubes will be plugged. Estimated restart date is October 23rd.
SPENT FUEL STORAGE UPDATE
' ~
Fuel assemblies in each core - 121 Fuel assemblies in the spent fuel storage pool - 401 Licensed spent fuel storage pool capacity - 1582*
Date of last refueling that can be discharged with present capacity - 1988**
- NRC authorized an increase in spent fuel storage capacity from 687 to 1582 spaces on May 13, 1981, but the approval li.aited the number of spent fuel assemblies which may be stored to 1120 until the heavy loads issue has been evaluated for Prairie Island.
- Pool No. I has been modified increasing the current capacity to 1017. Pool No. 2 will be modified prior to the next refueling.
8204090319 811012 PDR ADOCK 05000282 R
OPERATING DATA REPORT DOCKET NO 50 282 DATE R11oni COMPLETED BY A.
A.
MIN 9 TAD OPERATING STATUS TELEPHONE 612-388-1121 i
1.
Unit Name:
Prairie Island No. 1 2.
Reporting Period:
SEPTEMBER, 1981 Notes 3.
Licensed Thermal Power (MWt):
1650 4.
Nameplate Rating (Gross MWe):
593 5.
Design Electrical Rating (Net MWe):
530 6.
Maximum Dependable Capacity (Gross MWe): 534 g
7.
Maximum Dependable Capacity (Net MWe):
503 8.
If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:
5 Give Reason:
d C
9.
Power Level To Which Restricted, If Any (Net MWe):
f ' ' '.0.
Reasons for Restrictions, If Any:
s This Month Yr-To-Date Cumulative 720 6551 68303 11.
Hours In Reporting Period 12.
Number Of Hours Reactor Was Critical 435.4 6262.2 54429.3 1
13.
Reactor Reserve Shutdown Hours 14.6 18.8 5556.9 l
14.
Hours Generator On Line 433.3 6260.1 53250.7 15.
Unit Reserve Shutdcwn Hours 0.0 0.0 0.0 16.
Gross Thermal F.nergy Generated (MWH) 627198 10112586 82833267 17.
Gross Electrical Energy Generated (MWH) 202100 3309820 26791330__
18.
Net Electrical Energy Generated (MWH) 186633 3101821 25047428 19.
Unit Service Factor 60.2 95.6 78.0 20.
Unit Availability Factor 60.2 95.6 78.0
.21.
Unit Capacity Factor (Using MDC Net) 51.5 94.1 72.9 22.
Unit Capacity Factor (Using DER Not) 48.9 89.3 69.2 23.
Unit Forced Outage Rate 3.3 0.3 11.0
^4.
Shutdowns Scheduled Over Next 12 Months (Type, Date and Duration of Each):
25.
If Shut Down at End Of Report Period, Estimated Date of Startup:
811023
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J i
UNIT SifUTDOWNS AND POWER REDUCTIONS DOCKET NO.
50 7g7 REPORT MONTH SEPTEMBER, 1981 UNIT NAME Prairie Island No. 1 DATE ___ 811001 COMPLETED BY A-L 11HNSTAD TELEP110NE 612-388-1121 d"u Licensee n.,
u
-4 e
n s.
Cause & Corrective Date 37 5
33 Event 3 -$
8n Action to.
4
$?
l! U E Report #
$, O 5$
Prevent Recurrence 4
YE N
35$
$0 Qw GJ V) o 5
o S
?
a:
k 810831 F
16.7 A
3 NA NA NA Trip when a capacitor on a turbin e E-H control card failed and g;
turbine control valves closed.
z Reactor trip came from low steam E
generator level.
i 810919 S
270.0 C
2 NA NA
.NA Refueling 1
l F: Forced Reason Method:
Exhibit C-In-S: Scheduled A-Equipment Failure (Explain) 1-Manual structions for B-Maintenance or Test 2-Manual Trip Preparation of C-Refueling 3-Automatic Trip Data Entry Sheets D-Regulatory Restriction 4-Other (Explain) for Licensee Event E-Operator Training & License Examination Report (LER) File F-Administrative (NUREC-0161)
G-Operational Error (Explain) il-Other (Explain 5
Exhibit 1 - Same Source 4
4 9
NARRATIVE
SUMMARY
OF OPERATING EXPERIENCE e
DOCKET NO. 50- 306 UNIT Prairie Island No. 2-DATE 811001 COMPLETED BY A. A. HUNSTAD TELEPHONE 612-388-1121 MONTH SEPTEMBER. 1981 i
i Minor steam generator tube leakage had been observed for some time.
s h
On September 3rd the leakage had increased to the point where it was a:
felt the defective tube could be located by hydrostatic testing,.so at 2117 the unit was taken out of service.
It was found that one wrong tube end had been plugged during the spring refueling. Details z
E are in the followup report of R0-81-02.
The unit was returned to i
service at 1633 on September 13th and is base loaded at this time, r
f i
4 j
i e
m
DATLY UNIT POWER OUTPUT DOCKET NO. 50- 306 UNIT Prairie Island No. 2 DATE 811001 COMPLETED BY A. A. HimSTAD TELEPHONE 612-388-1121 MONTH SEPTEMBER, 1981 DAY AVERAGE LOAD FMe-Net LAY AVERAGE LOAD FNe-Net 502 497 i
1 17 3
482 455 2
18 372 498 7
3 19 s
-16 507
{
4 20
-10 511 5
21
-3 512 6
22
-11 514 7
23
-7 508 8
24
-8 504 9
25
-7 508 10 26
~9 511 11 27
-16 511 12 28 63 510 13 29 345 509 14 30 478 15 31 09' 16 Average loads above 500 !Me-Net are due to cooler condenser circulating water.
~
OPERATING DATA REPORT o
i DOCKET NO 50- 306 DATE 811001 j
COMPLETED BY A. A. HUNSTAD 1
OPERATING STATUS TELEPHONE 612-388-1121 1.
Unit Name:
Prairie Island No.
2 l
2.
Reporting Period:
SEPTEMBER, 1981 Notes l
3.
Licensed Thermal Power (MWt):
1650 4.
Nameplate Rating (Gross We):
593 5.
Design Electrical Rating (Net MWe):
530 6.
Maximum Dependable Capacity (Gross MWe): 531 g
7.
Maximum Dependable Capacity (Net MWe):
500 g
8.
If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:
Give Reason:
E 1
C 9.
Power Level To Which Restricted, If Any (Net MWe):
,of 10.
Reasons for Restrictions, If Any:
a This Month Yr-To-Date Cumulative 720 6551 59421 11.
Hours In Reporting Period 12.
Number Of Hours Reactor Was Critical 488.7 4200.4 50582.2 4
13.
Reactor Reserve Shutdown Hours 0.0 8.1 1516.1 14.
Hours Generator On Line 484.7 4151.0 49721.9 15.
Unit Reserve Shutdown Hours 0.0 0.0 0.0 16.
Gross Thermal Energy Generated (MWH) 773021 6644955 77743945 17.
Gross Electrical Energy Generated (MWH) 251720 2147050 24905990 18.
Net Electrical Energy Generated (MWH) 233863 2005137 23313040 19.
Unit Service Factor 67.3 63.4 83.7 20.
Unit Availabi]ity Factor 67.3 63.4 83.7 21.
Unit Capacity Factor (Using MDC Net) 65.0 61.2 78.5 22.
Unit Capacity Factor (Using DER Net) 61.3 57.8 74.0 23.
Unit Forced Outage Rate 0.0 20.2 5.8
)
'4.
Shutdowns Scheduled Over Next 12 Months (Type, Date and Duration of Each):
Refueline. Spring 1982, 6 weeks.
25.
If Shut Down at End Of Report Period, Esti=sted Date of Startup:
l
~
i.
-.~.
m x
e UNIT SHUTDOWS AND ER REDUCTIONS 1
DOCKET NO.
50-306 REPORT MONTH SEPTEMBER, 1981 UNIT NAME Prairic Island No. 2 DATE 811001 COMPLETED BY A. A. HUNSTAD TELEPHONE 612-388-1121 ec%
Licensee e
n Cause & Cor:rective a4 u
Date 8.
30 8
53 Event 3.$
8.n Action to N
3 II E Report #
EO 5$
Prevent Recurrence YS N
FEN 0
a
~
e" g a
O
~>
E f
810903 S
235.3 B
1 NA NA NA Shutdown to repair steam generator tube leakage, which m
was increasing.
E F: Forced Reason Method:
Exhibit G-In-S: Scheduled A-Equipment Failure (Explain) 1-Manual structions for B-Maintenance or Test 2-Manual Trip Preparation of C-Refueling 3-Automatic Trip Data Entry Sheets D-Regulatory Restriction 4-Other (Explain) for Licensee Event E-Operator Training & License Examination Report (LER) File F-Administrative (NUREG-0161)
G-Operational Error (Explain)
H-Other (Explain 5
Exhibit 1 - Same Source 4