ML19275A435
| ML19275A435 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 09/12/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 7910040400 | |
| Download: ML19275A435 (3) | |
Text
5
'o, UNITED STATES E
NUCLEAR REGULATORY COMMISSION n
{
2 WASHINGTON, D. C. 20555 S
September 12, 1979
+
Docket No. 50-255 Mr. David Bixel Nuclear Licensing Administrator Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201
Dear Mr. Bixel:
RE:
STEAM GENERATOR WATER HAMMER - PALISADES PLANT In response to our letter of September 2,1977, regarding steam generator water hammer at Palisades Plant you indicated that, based on your operating experience, modifications were not necessary to further reduce t'le proba-bility or consequences of steam generator water hammer at your #acility.
Although your operating history does not show that s.uch water hammer has occurred in your present piping arrangement, we require further assurance that steam g6nerator water hammer will not occur in the future and that surveillance procedures wou be adequate to detect water hammer or damage from water hammer if it wer' occur.
Your response to the enclosed request for additional infomation, together with previously supplied infomation, will provide a bases for a determination regarding the need for modifications to.your feedwater system to prevent steam generator water hammer.
Your response is needed within 60 days so that we may maintain our schedule for evaluating the potential for water hammer at your facility.
Si ncerely, J
wn Dennis L. Ziem
, Chief Operating Reactors Branch #2 Division of Operating Reactors
Enclosure:
Request for Additional Information
~
1095 s
cc w/ enclosure:
See next page 791004o g P
Mr. David Bixel September 12, 1979 w/ enclosure:
cc M. I. Miller, Esquire Isham, Lincoln & Beale Suite 4200 One First National Plaza Chicago, Illinois 60670 Mr. Paul A. Perry, Segretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan' Avenue Jackson, Michigan 49201 Myron M. Cherry, Esquire Suite 4501 One IBM P1aza Chicago, Illinois 60611 Ms. Mary P. Sinclair Great Lakes Energy Alliance 5711 Summerset Drive Midland, Michigan 48640 Charles Bechhoefer, Esq., Chairman Atomic Safety and Licensing Board Panel U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. George C. Anderson Department of Oceanography University of Washington Seattle, Washington 98195 Dr. M. Stanley Livingston 1005 Calle Largo Santa Fe, New Mexico 87501 Kalamazoo Public Library 315 South Rose Street Kalamazoo, Michigan 49006 1095
.~7
RE0 VEST FOR ADDITIONAL INFORMATION ON STEAM GENERATOR WATER HAMMER PALISADES DOCKET N0. 50-255 1.
Provide infomation that demonstrates that the feedwater system and steam generator water level at your facility have been subjected to those transient conditions that are conducive to water hanmer, i.e., the addition of cold feedwater or auxiliary feedwater to steam-filled feedwater piping and feedring.
See NUREG 0291 Page 4 that was fomarded to you on September 2,1977.
Include the following:
o 1.1 Describe the expected behavior of steam generator water level as a result of reactor trip from power levels greater than 30*; of full power.
Include actual plant measurements of steam generator level and other available related data such as feedwater flow and auxiliary feedwat-;r flow.
1.2 Provide the number and causes of loss of feedwater events during the operational history of the plant.
You nay refer to material submitted previously.
1.3 Provide the number and causes of loss of off-site power events during the operational history of the plant.
2.
If administrative controls have been adopted to limit the flow of auxiliary feedwater for the purpose of reducing the probability of water hammer, show when they were adopted and give the answers to items 1.1,1.2 and 1.3 for before and after such controls were established.
3.
If administrative controls have been adopted to limit the ficw of auxiliary feedwater for the purpose of reducing the probability of water harrner, show that an adequate water inventory and flow will be maintained to accommodate all postulated transient and accident conditions.
1095."J 4.
If auxiliary feedwater flow in your facility is not at present initiated automatically for normal and accident events, present your evaluation of whether automating the actuation of auxiliary feedwater might increase the probability of inducing steam generator water hammer.
One of the signals that would automatically initiate the flow of auxiliary feedwater would be the steam generator low water level.
This set point should be above the top of the main feedwater sparger to reduce the probability of steam generator water hammer.
5.
Describe the means that will be used to monitor for the occurrence of steac generator water hammer and possible damage from such an event.
Include all instrumentation that will be employed.
Describe the inspections that will be perfomed and give the frequency of such inspections.
6.
Describe the reporting procedures that will be used to document ard report water hammer and damage to piping and piping support systems.
ch re: orts were re;uested in our letter to you datec September 2, 1977.