ML20148A247
| ML20148A247 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 01/14/1988 |
| From: | Robert Williams PUBLIC SERVICE CO. OF COLORADO |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-85-003, IEB-85-3, P-88001, NUDOCS 8801220500 | |
| Download: ML20148A247 (12) | |
Text
- - -
Public Service ~
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January 14, 1988
$nd, %m Fort St. Vrain Unit No. 1 R.O. WILUAMS, JR.
P-88001 vice pResioeNT NUCLEAR OPERATIONS U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 Docket No. 50-267
SUBJECT:
IE Bulletin 85-03 Program Completion
REFERENCES:
See Attachment 1 Gentlemen:
l This letter provides a written report on Public Service Company of l
Colorado's (PSC) Motor Operated Valve (MOV) Program and is intended to fulfill the requirement of IE Bulletin No. 85-03 (Reference 1), to I
provide a written report within 60 days of completion of the program.
As explained in Reference 2, based upon a review of shutdown cooling l
systems at FSV, PSC considers the emergency feedwater and emergency l
condensate headers to be analogous to the high pressure coolant l
injection / core spray and emergency feedwater systems of a LWR, The motor operated valves in the 6forementioned systems that may be used l
to ensure shutdown cooling are considered the "covered" valves and l
are included in PSC's MOV test program. The valves to be covered I
were identified in References 3 and 4 which, along with PSC's previous submittals, provided the design basis for operation of each l
valve and the maximum differential pressure the valve could l
experience during operation.
In summary, the maximum pump discharge l
pressure was chosen to be the maximum differential pressure of the pump (s) supplying the line in which the valve is found.
l PSC has tested all the valve operators in our MOV test program, using the methodologies developed by M0 VATS Incorporated.
These I
methodologies were previously submitted by Union Electric's Calloway l
Plant (References 5 and 6) on a pilot plant basis.
M0 VATS l
methodologies are in agreement with our original submittal (Reference 2).
In general the M0 VATS test program involves calculating the i
thrust required for the design differential pressure, connecting a l
load cell and a Thrust Monitoring Device to the operator to simulate l
the maximum load the valve would see during maximum design conditions, and then recording the valve and motor signatures during operation under the simulated load conditions.
This allows proper setting of the various limit and torque switches and will allow for
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8801220500 880114 PDR ADOCK 05000267
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P-88001 January 14, 1988
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future evaluation of. the valve and operator by providing baseline data against which future motor signatures can be evaluated.
i The switch settings developed with the M0 VATS methodologies were verified by testing against the-maximum differential pressures possible during plant conditions.
One valve operator of each Limitorque trodel was tested in this manner. All covered valves have been tested and adjusted to the proper switch settings, and no valves a
were found inoperable. shows the "Summary of
+
Significant MOV Abnomalities" based upon this initial testing.
PSC has developed a program to evaluate all covered MOVs on a Refueling Cycle basis (this ensures all covered valves are tested at least once per 18 months).
The correct switch settings, as determined for each valve based upon the maximum expected differential pressure, have been incorporated into plant engineering procedures. To change any of these values new calculations must be performed and approved by the Plant Engineering organization prior to using the new values. Attachment 3 provides a list of the covered valves and related information including As Left (AL) switch settings, design and test differential pressures and other information as requested by Reference 1.
No As Found (AF) settings are listed because all of our covered valves had their switches replaced as a part of the Environmental Qualification Prog:am and initial settings were made during the development of our M0V testing program.
If you have any questions regarding this information, please contact i
Mr. M. H. Holmes at (303) 480-6960.
Very trul,y yours, R.0. Williams, Jr.
Vice President Nuclear Production R0W/ KAP /imb Attachments I
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P-88001 January 14, 1988 cc:
Regional Administrator, Region IV ATTN: Mr. T. F. Westerman, Chief Project Section 8 Mr. Robert Farrell Senior Resident inspector Fort St. Vrain Mr. Jose A. Calvo, Director Project Directorate IV i
i l
l l
4 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter
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Public Service Company of Colorado Docket No. 50-267 Fort St. Vrain Unit No. 1
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AFFIDAVIT R.
O.
Williams, Jr. being first duly sworn 6 deposes and sayst That he is Vice President, Nuclear Operations, of Public Service Company of Colorado, the Licensee herein, that he has read the information presented in the attached letter and knows the contents thereof, and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.
N i
R. O. Williams, Jr.
Vice President Nuclear Operations P
STATE OF
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P-88001 January 14, 1988
References:
- 1) IE Bulletin 85-03 dated 11/15/85 (G-85471)
- 2) PSC letter, Walker to Gagliardo dated 5/14/86 (P-86356)
- 3) PSC letter, Williams to NRC dated 10/15/87 (P-87353)
- 4) PSC letter, Williams to NRC, dated 9/16/87 (P-87295)
- 5) Union Electric letter, Schnell to Keppler dated 10/17/86 (VLNRC-1387)
- 6) Union Electric letter, Schnell to the NRC dated 3/5/87 (ULNRC-1456) l l
1
to P-88001 Page 1 of 1-
SUMMARY
OF SIGNIFICANT M0V ABNORMALITIES Abnormal Condition Valves with Abnormality (%)
- Bypass switch improperly set 100 Incorrect thrust Not Known**
Unbalanced torque switch 100***
Valve backseating 0
High motor current 0-Torque switch abnormalities 0
Miscellaneous abnormalities 0
Percent of valves experiencing abnormality.
The total does not equal 100 percent as most valves had more than one abnormality.
Abnormalities did not prevent proper functioning of valves and tney were not declared inoperable.
Switches were replaced as part of Environmental Qualification program, and original settings are not known.
Valves did function properly during preliminary stroke testing.
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Page 2 of 6
'Vaivc Component As found Vaive Ope r_a b i l i t y Test Medhod Description /Just i fication ID r
HV-3108 Ope ra b le Va lve was tested a t maximum differential pressure obtainable, due to plant conf i gu ra t i on.
T he va l ve wa s adj us ted w i th a simulated load for the liasis delta P condition, but since this assumes a l i ne b rea k, it could not be simulated.
HV-3109 Ope ra b l e Valve was not tested against actual d i f fe ren t ia l p re ssu re. A simulated load was applied for swi tch adjustments. Settings were confi rmed by s imi la ri ty to HV-3108.
HV-3110 Ope ra b l e Valve was not tested against actual d i f fe rent ia l p re s su re. A simulated load was applied for switch adjustments. Settings were confi rmed by similarity to llV-3108.
HV-31118 Ope ra b l e Valve was tested at maximum practica l d i f fe rent ia l pressure, conside ring plant configurat ion.
The valve was adjusted with a simulated load for the Basis detta P condition, but since this assumes a l ine break, it could not be simulated.
T Page 3 or 6 Switch Settings final Switch Prior to Adjustments Settings in as a Result of Response to Basis Delta P Test Delta P balletin Bulletin yalve ya l ve Ope ra to r Valve function gpen/Close 9 pen /Close Open/Close Open/Close HV-31119 L i m i to rque, 18 Boiler f eed 4500/4500 Note 2 Note 5 2.25/2.25 8" stop Modei SMB-3 Pump / Ime rgency
- check, Motor Speed F eed lleader 2500 lb, is 1720 rpm isolation RockweII Edwa rd ModeI A3906MY HV-31120 L i m i to rq ue, 1C Boi ler f eed 4500/4500 Note 2 Note 5 1.75/1.75 8" stop Model SMB-3 Pump /[mergency
- check, Motor Speed f eed lieader 2500 lb, is 1720 rpm isolation RockwelI E dwa rd Model A3906MY HV-31191 Limitorque, E me rgency 450/450 Note 3 Note 5 1.5/2.0 8" Cate Model SMB-0 Condensate /
- Valve, Motor Speed E me rgency 300 lb, is 1700 rpm Condensate lleader Walworth Isolation Mode 1 5206WE HV-2237 L i m i to rq ue, Ime rgency 450/450 Note 1 Note 5 2.0/2.25 8" Globe-Model SMB-4T Condensate /
Y, 2500 Motor Speed EES Header Ib.
is 1685 rpm isolation, Loop 1 Walworth Modei P-418313 HV-2238 L i m i to rq ue, E me rgency 450/450 Note 1 Note 5 2.5/2.5 8" Globe-Model SMB-47 Condensate /
Y, 2500 Motor Speed LES Header ib, is 1685 rpm isolation, Loop 2 Walworth Model P-418313
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Page 4 of 6 l
i Vaive Component As Found Vaive ID Ope ra b i l i ty Test Method Description / Justification HV-31119 Ope ra b le Valve was not tested against actual d i f fe rent ia l pressure. A simulated L d was applied for switch adjustments. Settings were confirmed by simi la ri ty to HV-31118.
i HV-31120 Ope rab l e Valve was not tested aga inst actua l differentia l p res su re.
A simulated j
load was applied for switch adjustments. Settings were confirmed by simi la ri ty to HV-31118.
t HV-31191 Ope rab le Valve was not tested against actual d i f fe rent ia l p re ssu re. A simulated load was applied for swi tch adjustments. Settings were confirmed by simi la ri ty to HV-3133-1.
HV-2237 Ope ra b le Valve was not tested against actual d i f fe rent ia l p ressu ro.
A simulated load was applied for switch adjustments. Settings were confi rmed by simi la ri ty to HV-3108.
The Basis delta P is much less than HV-3108, and the valve is smaller, but the applicability of' the methodology to the SMB-4T operator was shown with HV-3108.
1 i
HV-2238 Ope ra b le va l ve wa s not tested against actual d i f fe rent ia l p ressu re.
A simulated-Ioad was applied for switch adjustments. Settings were confirmed by simi la rity to HV-3108.
The Basis delta P is much less than ifV-3108, a nd the va l ve i s sma l l e r, bu t the applicability of the methodology to the SMB-4T operator was shown with HV-3108.
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Page 5 of 6 Switch Settings final Switch Prior to Adjustments Settings in as a Result of Response to Basis Delta P Test Delta P Bulletin Bulletin Valve ya lve Opemgor yalve Function Open/Close Open/Close Open/Close Open/Close liv-3133-1 L i m i to rque, Condensate Pump 450/450 325/325 Note 5 2.0/2.875 8" Cate, Modei SMB-0 D i scha rge 300 lb, Motor Speed Isolation Walworth is 1700 rpm Modef $206WE ItV-3135-1 L i m i to rque.
Condensa te Pump 450/450 Note 3 Note 5 1.625/2.25 8" Gate, Modei SMB-O D i scha rge 300 lb, Motor Speed Isolation Walworth is 1700 rpm Model $206WE ItV-3133-2 L i m i to rque,
Condensate Pump /
450/b50 Note 4 Note 5 1.5/2.0 6" Cate, Model SMD-00
[mergency 300 lb, Motor Speed Condensate Itcader Walworth is 1700 rpm isolation Model $206WE liv-3135-2 L i m i to rq ue, Condensate Pump /
450/450 350/350 Note 5 1.75/2.25 6" Cate, Model SMB-00 Emergency 300 l b, Motor Speed Condensate lleader Walworth is 1700 rpm isolation Model $206WE
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Page 6 of 6 Vaive Component As Found VaIve ID Ope rab i l i ty Tesi_Melhod Description /Justific n ion ifV-3133-1 Ope rable Valve was tested at maximum practica l d i f fe rent ia l pressure, considering plant configuration.
The valve was adjusted with a simulated load for the Basis delta P condition, but since this assumes a line break, it could not simulated.
IIV-3135-1 Ope ra b l e Valve was not tested against actual d i f fe ren t ia l p res su re.
A simulated Road was applied for switch adjustments. Settings were confi rmed by i
i simi la ri ty to ilV-3133-1.
HV-3133-2 Ope rab l e Valve was not tested against actual d i f fe rent i a l p res su re. A simulated load was applied for swi tch adjustments. Settings were confirmed by l
simi la ri ty to ilV-3135-2.
HV-3135-2 Ope rab le Va lve was tested at maximum practical d i f fe rent ia l pressure, considering plant configuration.
The valve was adjusted with a simulated load for the easis delta P condition, but since this assumes a l ine b rea k, it could not be simulated.
Note 1 Qua l i fied by s imi la ri ty to HV-3108 Note 2 Qua l i fied by simi la ri ty to HV-31118 Note 3 Qualified by similarity to llV-3133-1 No*.e is Qua l i fied by simi la ri ty to llV-3135-2 Note 5 New swi tches were installed as a part of the [Q program, and As Found settings are not meaningful.
The switches were set to the As Lef t values prior to the alves being placed in service.
_ _