ML18043B171
| ML18043B171 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/12/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Groce R YANKEE ATOMIC ELECTRIC CO. |
| References | |
| TASK-05-13, TASK-5-13, TASK-RR NUDOCS 7910040403 | |
| Download: ML18043B171 (3) | |
Text
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DJSTRIBUTION SEP 12 1979 Mr. Dav id Bixel Nuclear Licenslng Administrator Consumers Power Company *
- 212 West Mi~higan Avenue Jackson; Mi.chi g_an 49201
Dear*Mr. Bixel:
RE:
STEAM GENERATOR ~JATER HAMMER ~ PALISADES PLANT In response to our 1 etter of* September. 2,. 1977, regarding steam generator wate~ hammer at Palisad~s Plant you indicated that, based on your opetating experience, modifications were not* necessary to further reduc~ tiie pro~a-_
bil ity or consequences of steam generator water 'hammer at your facility.*
Although *your *operat-ing history does not shOw that such water hammer has occurred. in your present piping* arrangement, ~..,e require* further assurance that steam *generator_ water h~mrner: will not*occur 1n _the future and :that surveil 1 ance procedures wou-1 d be adequate to* detect ~1ater harrrrner or damage from ~i.ater hammer if it were to occur*.
. Your response to.the enclas*ed request for additional informatibn, together_
with previously suppl 1ed infonnation~ will provide a* bases for a determina_tion regarding t_he ne~d for modifications to your foedwater system to prevent stesim* generator \\*1ater hammer.
Your* response is needed within 60. days so that '(Je may maintain our schedule for evaluating t.he potential f6r*water
- , hammer ~t your facility~
Enclosure:
Re~ues~ f6r Ad~itional
, Infonnat1on Sincerely, Original signed by
~nn,111 L. liarul\\nu Dennis L. Ziemann,*Chief Operating Reactors B~anch#2 Division of Operaiing Reactors**
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Mr. David Bi xe1
. cc w/enclosure:
. M. I. Miller, Esquire Isham~ Lincoln & Be~l~
- Suite 4200
- One First National Plaza Chicago, Illiriois 60670 Mr. Paul A. Perry, Sesretary.
Consumers Power Company 212 West Michigan Avenue Jackson, ~ichigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigah"Avenue Jackson, Michigan 49201
- Myron M. Cherry, Es qui re.
Suite 4501 One ~BM Plaza Chicago, Illinois
~0611 Ms.* Mary P. Sinclair Great Lakes Energy Alliance 5711 Summerset* Drive *
- .. Midland, Michigan 48640-Charles Bechhoefer, Esq., Chairman Ato~ic Saf~ty arid ~icensing Board Panel U. S. Nuclear Regulatory Commission Washington, D. c.
20555 Or~ George C~ Anderson Department of Oceanography University of Washington Seattle,. Washington 98195 Or. M. Stanley Livingston l 005 Ca 11 e Largo Santa Fe, New Mexico 87501 Kalamazoo Publi~ Library 315 South Rose Street Kalamazoo, Michigan 49006
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. Septernber 12, 1979
REQUEST FOR ADDITIONAL INFORMATION ON STEAM.GENERATOR WATER HAMMER PALISADES
- DOCKET NO. 50-255
- l.
- Provide infonnation that demonstrates thatthe feedwater system and steam generator water level at your facility have been subject~d tci those tran~ient conditions-that are conducive
. to water hanrner,. i.e., the addition of cold feedwater or aux1liary feedwater to steam-filled feedwater piping and feedring.
See
- NUREG 0291 Page 4 that wasforwarded to you on September 2, 1977.
Include the following:
1.1 Describe the expected behavior of steam generator water level as a result of reactor trip -from power. levels greater.
than. Jm; of full power.
Include actual pl ant measurements of-steam generator level and other available related data such as feedwater flow and auxiliary feedwat;::r flow~
- 1.2 Provide the numbe~ and cause~ of loss ~f f~edwater events during the operational history of the plant~. You ~ay refer to material submitted previously.
1.3 Provi~e the number and causes of loss of off-site power events ~uririg the operational history of the plant.
2~
If admini~trative*controls have been adopted to limit the flow of*
auxiliary feedwater for the purpose of reducing the probability of water hanrner, show when they were adopted and give the answers to items l.l, 1.2 and 1.3 for before and after such controls were established.
- 3.
If administrative controls have been.adopted to limit.the flow of auxiliary feedwater for the purpose of reducing the probability of water* harrrnel_", show that an* adequate-water inventory and flow wil 1 be maintained to accommodate all postulated transient and accident conditions.
- 4.
If auxiliary feedwater flow in your facility is not at present initiated automatically for no.rmal 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. probabi 1 ity of. steani *generator water hammer..
- 5. : Describe the meahs that will be used to monitor for the 6ccurrence of steam generator water.hammer and possible damage from such an
- event.
Include all instrumentation that will be employed~. Describe the inspections that will be performed and give the frequency of such insp~ctions.
- 6.
bescribe the reporting procedures that will b~ used to document
. and report water harrmer and damage to piping and piping support systems.* Such reports were requested in our letter to you dated September 2, 1977.