W3P88-1247, Responds to NRC Bulletin 88-004 Re safety-related Centrifugal Pumps.Util Has Identified 34 safety-related Centrifugal Pumps for Evaluation.List of Pumps Provided
| ML20151C100 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 07/12/1988 |
| From: | Burski R LOUISIANA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-004, IEB-88-4, W3P88-1247, NUDOCS 8807210226 | |
| Download: ML20151C100 (9) | |
Text
--
n 4"
LOUIB1 AN A / 317 BARONNE STREET P. O. BOX 60340 POWE R & LIGHT NEW ORLEANS, LOUISIANA 70160 (50Q 595-3100 NNsIrsSIU July 12, 1988 W3P88-1247 A4.05 QA U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555
Subject:
Waterford 3 SES Docket No. 50-382 License No. NPF-38 NRC Bulletin No. 88-04 NRC Bulletin 88-04 was issued May 5, 1988 requesting action from holders of operating licenses or construction permits for.quelear power reactors to investigate and correct as applicable two mini-flow design concerns. The first concern involves the potential for dead-headinF of one or more pumps in safety related systems that have a mini-flow line common to two or more pumps or other configuratiens that do not preclude pump to pump interaction during mini-flow operation. A second concern involves determining whether or not the installed mini-flow capacity is adequate for a single pump in operation.
Review of Waterford 3 design has identified thirty-four safety related centrifugal pumps for evaluation in regards to the concerns of NRC Bulletin 88-04.
The following is a list of safety related centrifugal pumps which are considered in the scope af this Bulletin for Waterford 3:
Pump Quantity Supplier Diesel Oil Transfer 2
Ebasco Diesel Generator Stand-by 2
Cooper-Bessemer Jacket Water (Motor Driven)
Diesel Generator Main 2
Cooper-Bessemer Jacket Water (Engine Driven)
Auxiliary Component Cooling Water 2
Ebasco Component Cooling Water 3
Ebasco HVAC Chiller Water 3
Ebasco Containment Spray 2
Ebasco Component Cooling Water Make-up 2
Ebasco Emergency Feedwater 3
Ebasco del BBPiBEnBS8'$82
'p G
uAN EQUAL OPPORTUNITY EMPLOYER"
.Page-2 W3P88-1247 Pump Quantity Supplier Boric Acid Make-up 2
-Combustion Engineering Flash Tank 2
_ Combustion Engineering Reactor Drain Tank 1
Combustion Engineering Equipment Drain Tank 1
Combustion Engineering Fuel Pool 2
Combustion Engineering
.LPSI 2
Combustion Engineering-HPSI 3
Combustion Engineering TOTAL 34 The primary concern of Bulletin 88-04 is the potential for dead-heading one or more pumps that have a common mini-flow recirculation line that does not
-preclude pump-to-pump interaction during mini-flow operation. Upon reviewing the design drawings, this condition is not a concern for the non-Combustion Engineering supplied pumps at Waterford 3.
There are no piping configurations that will result in the dead-heading of one or more pumps during mini-flow operation. Except as noted below, the non-Combustion Engineering supplied pumps do not have a common mini-flow line. The Emergency Feedwater, Component Cooling Water Make-Up, and the Containment Spray Pumps have a common mini-flow arrangement. However,-the configuration is such that it will prevent the dead-heading of any pump (s).
The mini-flow lines are branched off before the first check valve in the discharge line and return to a storage tank, rather than the pump suction lines. The tie-in points to the. common line are also downstream of the pressure reducing orifices. Attachment No. I provides a tabular summary for each pump. Based on the above discussion, there are no corrective actions required for the non-Combustion Engineering supplied pumps at-Waterford 3 for this item.
P The second concern involved the adequacy of the mini-flow capacity for single pump operation. The non-Combustion Engineering' supplied pumps have been analyzed based on calculations, and their mini-flow rates have been determined to be sufficient with the exception of the Containment Spray, Component Cooling Water Make-Up, Diesel Oil Transfer, and Auxiliary Component Cooling Water Pumps. Calculations indicate that the mini-flow rates for these pumps are below the suppliers mini-flow requirements.
Attachment No. 2 provides a tabular summary for each pump analyzed.
As a result of these calculations, Waterford 3 will perform field testing l
to determine the actual mini-flow rates on those pumps which calculations show are below the suppliers mini-flow requirements.
A review of the maintenance history for the non-Combustion Engineering supplied pumps shows that these pumps have not had a failure or experienced pump damage that can be attributed to cumulative operation or testing in the mini-flow recirculation mode. Problems that would be associated with pump operation below the mini-flow recirculation capacity, such as impeller, shaft or bearing damage, have not been evident at Waterford 3 to
'date.
LP&L will continue to monitor pump maintenance history with particular attention paid to those pumps which calculations show may have lower than expected mini-flow rates.
l l
Page 3 W3P88-1247 LP&L has contacted all of the above non-Combustion Engineering pump suppliers to determine if the mini-flow rates specified in the original pump manuals are adequate to prevent pump damage. With the possible exception of the Auxiliary Component Cooling Water, Component Cooling Water Make-Up, and the Containment Spray Pumps (the supplier has yit to respond to our request), the mini-flow value originally specified are acceptable.
This effort is also summarized in Attachment 2.
A schedule for completion of the evaluations of the Combustion Engineering supplied pumps required by this Bulletin cannot be specified at this time since the magnitude of the required effort has not been established.
However, Louisiana Power & Light is participating in the formulation of a Combustion Engineering Owners Group effort.
The Owners Group is eApected to review design drawings and flow calculations to address the concerns raised in Bulletin 88-04 for the HPSI and LPSI pumps. The remaining pumps supplied by Combustion Engineering will be analyzed by LPat with assistance from Combustion Engineering if necessary.
Based on the effort of the Combustion Engineering Owners Group, and the need to perform testing on Containment Spray, Component Cooling Water Make-Up, Diesel Oil Transfer, and Auxiliary Component Couling Water Pumps, Louisiana Power & Light is requenting an extension on the action items required by NRC Bulletin 88-04.
Upon completion of testing, LP4L will provide a summary of the test results, subsequent evaluations, and a corrective action schedule, if applicable, to the Staff.
In addition, a status of the analysis for the Combustion Engineering supplied pumps will also be provided. LP&L expects to submit the summary to the NRC by November 1, 1988.
Should you have any questions, please feel free to contact me or Larry Laughlin (504) 464-3499.
Very truly yours, weh R.F. Burski Manager Nuclear Safety & Regulatory Affairs SFB:DDG:ssf Attachments cc: NRC, Document Control Desk J.A. Calvo, NRC-NRR D.L. Wigginton, NRC-NRR j
NRC Resident Inspectors Office E.L. Blake W.M. Stevenson
UNITED STATES OF. AMERICA NUCLEAR REGULATORY COMMISSION In the matter of
)-
')
Louisiana Power & Light Company
) Docket No. 50-382 Waterford 3 Steam Electric-Station
)
AFFIDAVIT R.F. Burski, being duly sworn, hereby deposes'and says-that-he is Nuclear Safety-and Regulatory Affairs Manager of Louisiana Power & Light Company; that he is duly authorized to sign and file with the Nuclear.
Regulatory. Commission the attached response to NRC Bulletin No. 88-04; that he is familiar with the content thereof; and that the catters set forth therein are true and correct to the best of his knowledge, information and belief.
R.F. Burski Nuclear Safety & Regulatory Affairs -
Manager STATE OF LOUISIANA)
) ss PARISH OF ORLEANS )
1 l
Subscribed and sworn to before me, a Notary Publi in and for the Parish and State above named this
/c7 d day of 1988.
(/
O otary Public My Commission expires,
,D 4
l
i ATTACHMENT 1 to I
W3P88-1247 Page 1 of 2 Concern 1: Potential for dead-heading one or more pumps that have a common mini-flow recirculation ?ine that does not preclude pump-to-pump interaction during mini-flow operation.
Recommended Pump _Name Remark Action Diesel Oil Transfer Pumps:
The two diesel oil transfer systems are None EGF-MPMP-0001A independent of one another; hence no EGF-MPMP-0001B pump interaction. There are no flow (Individual mini-flow control valves in either transfer racirculation lines) system that would throttle flow.
Diesel Generator Stand-By System design and operating procedures None Jacket Water (Motor Driven) eliminate the need for a mini-flow re-Pumps: EGC-MPMP-0001A circulation line. The pumps discharge EGC-MPMP-0001B to the Jacket Water Circulation system.
(No mini-flow recirculation There are no flow control valves line) throttling pump flow.
Diesel Generator Main Jacket System design and operating procedures None Water (Engine Driven) Pumps:
climinate the need for a mini-flow re-EGC-MPMP-0002A circulation line.
The pumps discharge EGC-MPMP-0002B to the Jacket Water Circulation system.
(No mini-flow recirculation There are no flow control valves line) throttling pump flow.
Auxiliary Component Cooling The two auxiliary component cooling None Water Pumps: ACC-MPMP-0001A water systems are independent of one ACC-MPMP-0001B another hence; no pump interaction.
(Individual Mini-flow Temperature control valve throttles the Recirculation Lines) system flow in each train.
Component Cooling Water Pumps:
These pumps have common suction and None CC-MPMP-0001A discharge headers to "A" and "B" trains CC-MPMP 0001B of the CCW system. System design and CC-MPMP-0001A/B operating procedures eliminate the need (No mini-flow recirculation for a mini-flow recirculation line.
line)
Pumps discharge into a close loop system with no flow control valves.
i HVAC Chiller Water Pumps:
Each pump has its own mini-flow recircu-None CHW-MPMP-0001A lation line. The recirculation line for CHW-MPMP-0001B each pump / chiller loop contains a flow CHW-MPMP-0001A/B control valve which automatically opens (Individual mini-flow on decreasing system flow so as to main-recirculation lines) tain a minimum flow rate of water through the chillers.
ATTACHMENT 1 to W3P88-1247 Page 2 of 2 Recommended Pump Name Remark Action Containment Spray Pumps:
The recirculation line from CS-MPMP-None CS-MPMP-0001A 0001A ties into a common return line CS-MPMP-0001B shared by the recirculation lines from (Common mini-flow HPSI Pump A and LPSI Pump A.
The recir-
.rscirculation line) culation line from pump CS-MPHP-0001B ties into a common return line shared by the recirculation lines from HPSI Pump B and LPSI Pump B.
During a CSAS, the pumps start and the containment isolation valves open, hence normal spray flow should exist (and minimim flow requiremento will be met).
Component Cooling Water The two mini-flow recirculation lines tie None Make-Up Pumps:
into a common return line downstream of CMU-MPMP-0004A the two restriction orifices.
The CMU-MPMP-0004B interaction of the recirculation flows (Common mini-flow in the common return line precludes recirculation line) deadheading of one or more. pumps because of this configuration.
Emergency Feedwater Pumps:
The three mini-flow recirculation lines None EFW-MPMP-0001A tie into a commen return line downstream EFW-MPMP-0001B of the two restriction orifices.
The EFW-MPMP-0001A/B intercction of the recirculation flows (Common mini-flow in the common return line precludes recirculation line) deadheading of one or more pumps becatse of this configuration.
I i
ATTACHMEhT 2 to W3P88-1247 Page 1 of 3 l
Concern 2:
Adequacy of the mini-flow capaci~y for single pump operation.
c Supplier Calculated Recommended Mini-flow Recommended Pump Name Mini-flow Rate Rate Action Diesel Oil Transfer Pumps:
Original Recommendation:
Calculations indicates
- 1. Test to determine actual mini-EGF-MPMP-0001A 20 GPM line will pass 18 GPM flow rate during recirculation EGF-MPMP-00013 Latest Recommendation:
if discharge header and evaluate for corrective (Individusi mini-flow 20 GPM isolation valve is action, if applicable.
recirculation lines) inadvertently closed.
Diesel Generator Stand-By Original Recommendation:
Not Applicable None Jccket Water (Motor Driven)
No mini-flow recirculation Pumps:
lines ECC-MPMP-0001A ECC-MPMP-0001B (No mini-flos recirculation line)
Diesel Generator Main Original Recommendation:
Not Applicable None Jccket Water (Engine Driven) No mini-flow recirculation Ps:mps:
lines ECC-MPMP-0002A ECC-MPMP-0002B (No mini-flow recirculation line)
Auxiliary Component Cooling Original Recommendation:
Calculations indicates
- 1. Test to determine actual mini-W2ter Pumps:
150 GPM the mini-flow recircu-flow rate during recirculation ACC-MPMP-0001A Latect Recommendation:
lation will pass 135 GPM and evaluate for corrective ACC-MPMP-0001B Awaiting Supplier whan discharge header or ar-ion, if applicable.
(Individual mini-flow confirmation temperature control rceirculation lines) valve is closed.
ATTACHMENT 2 to W3P88-1247 Page 2 of 3 Supplier Calculated Recommended Mini-flow Recommended Pump Name Mini-flow Rate Rate Action l
Component Cooling Water Original Recommendation:
Not Applicable None Pumps:
No mini-flow recirculation CC-MPMP-0001A lines CC-MPMP-0001B CC-MPMP-0001A/B (No mini-flow recirculation lines)
HVAC Cliller Water Pumps:
Original Recommendation:
The recirculation for None CHW-MPMP-0001A 5 GPM cach pump / chiller loop CHW-MPMP-0001B Latest Recommendation:
is designed to maintain CHW-MPMP-0001A/B 5 GPM a minimum flow through (Individual mini-flow the chiller. The rceirculation lines) chiller's minimum flow requirements are greater than 5 GPM.
Containment Spray Pumps:
Original Recommendation:
Calculations indicate
- 1. Test to determine actual mini-CS-MPMP-0001A 60 CPM that each pump will flow rate during recirculation CS-MPMP-0001B Latest Recommendation:
pass 59 CPM through its and evaluate for corrective (Common mini-flow Awaiting Supplier mini-flow recirculation action, if applicable.
rscirculation line) confirmatfor line when pump is running witii a closed discharge valve.
ATTACHMENT 2 to W3P88-1247
~
Page 3'of 3' Supplier Calculated Recommended Mini-flow Recommended Pump Name Mini-flow Rate Rate Action Component Cooling Water Original Recommendation:
Calculations indicate
- 1. Test to determine actual mini-Make-Up Pumps:
30 CPM that'each pump will pass flow rate during recirculation CMM-MPMP-0004A Latest Recommendation:
24 GPM through its mini-and evaluate for corrective CMM-MPMP-0004B Awaiting Supplier flow recirculation line action, if applicable.
(Common mini-flow confirmation when one punp is running recirculation line) with a closed discharge valve, or each will pass 23 CPM through its mini-flow recirculation line when both pumps are running 2
with closed discharge j
valves.
Emergency Feeducter Pumps:
Original Recommendation:
Calculations of the' mini-None EFW-MPMP-0001A (Motor Motor Driven - 45 GPM flow recirculation lines Driven)
Turbine Driven - 80 CPM indicate that all three EFW-MPMP-0001B (Motor Latest Recommendation:
pumps will provide greater Driven)
Motor Driven - 45 CPM than their required mini-EFW-MPMP-0001A/B (Turbine Turbine Driven - 80 CPM-flow rates when all three
?
Driven) pumps are running.
j (Common mini-flow recirculation lines) t 8
i
+
b i
4 1
4
.. -