ML19323F683
| ML19323F683 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 05/07/1980 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| TASK-10, TASK-RR NUDOCS 8005290331 | |
| Download: ML19323F683 (7) | |
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4 UNITED STATES s
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NUCLEAR REGULATCRY COMM!SSION g
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Dockat f:o. 50-213
!!r. W. G. Counsil, Vice President i:uclear Engineering and Operations Connecticut Yankee. Atonic Power Company Post Office Box 270 Hartford, Connecticut 05101
Dear "r. Ccunsil:
On Octcher 14, 1979 we advised you of our requirements for the auxiliary
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feedwater systems at the Haddam ?!eck Plant. These requirements were identi-1 fied during the course of the NRR Bulletins and Orders Task Force review of operating reactors, foll wing the accident at Three liile Island, Unit 2.
1 We are in the prccess of revieuing your response, dated Decenter 4,1979, I
to these requirements, and have identified several areas in which we,have cor.cluded that further action by you is required.
The attachment to this letter details the status of our review and describes those open items which require an additional response frca you.
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1-le req;est that you re-evaluate your response in light of our cca ents and i
that ycu subnit this evaluation and an associated schedule and committr.ent for implenentation of required changes or actions for !;RC staff review with-in thirty days of receipt of this letter.
If you have any questions, pleasa contact us.
Sirperely,
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s Dennis M. Crutchfield, Chief i
Operating Reactors Branch #5 Division of Licensing Attach. Tent:
1 As stated i
i cc w/sn:losure:
See next pace THIS DOCUMENT CONTAINS P0OR QUAUTY PAGES l
800529o33/
Mr. i'. G. Counsil May 7, 1950 cc Ocy, Eerry & Hoiard U. S. Envirormental Protection Counselors at Law Agency One Constitution Plaza Region I Office Hartford, Connecticut 06103 ATTN:
EIS COORDINATOR JFK Federal Euflding Superintendent Boston, Massachusetts 02203 Haddam Neck Plant RFD 91 Post Office Box 127E East Hampton, Connecticut 06424 Mr. James R. Himmelwright
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Northeast Utilities Service Company P. O. Box 270 Hartford, Connecticat 06101 Russell Library ll? Sroad Street Middletown, Connecticut 06457 Board of Selectmen Tmin Fall Haddam, Connecticut 06103 Connecticut Energy Agency ATTN:
Assistant Director Research and Policy Develepaent Department of Planning and Energy Policy 20 Grand Street Hartford, Connecticut 06106 Director, Technical Assessment Division Of fice of Radiation Programs '
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U. S. Envircnaental Protection Agency Crystal Mall 2 Arlington, Virginia 20450
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Attachment Auxiliary Feedwater System Requ9ements Haddam Neck Plant >
Docket No. 50-213 A.
Short Tem Recorrendations 1-4.
F.ecorrendation GS-1 thru 5 Your response to thsse re:ccmEndationS are acceptable.
5.
Recormendation GS-6 Your response to this recxmnerdation is only partially acceptable. We require that each auxiliary feedwater train have'two operators verify proper valve alignr.ent following periodi: 2 sting or maintenance. Revise your procedures as ne:essary to meet this req.f rerent..
6.
Fecomendation GS-8 Your responses to this re:cmrandation is i:nder review. We will provide the results of our review at a la.er date.
7.
Fecorrendation (Plant Specffi: X.5.3.1.(7)
Your response to this recuest is acceptable.
3 B.
Additional Short Tem Re: cane-dations 1.
Your resmnse to this recomune-dation is net sufficient. We require the new le.el indications to includie redur.dancy from the detectors to the level
indlications inside the centrol room plus redundant power supphes at least cne of which is battery backed.
2.
k~e have rtvised this reconcendation such that a 48-hour pump endurance test is required rather than a 72-hour test. You should follow the enclosed revised Additional Short Tem Recomendation No. 2 and provide the requested
'nforaation. If, as you indicate in your response, your ArW pumps have already teen operated for time periods that could be considered adequate for an endur-ance test, identify the length of time and respond to the requested infcar.ation in the enclosure to the exter.t possible with your existing infomation.
If to ir.forcation is available, take the requested data at the next anticipated long-tem continuoos run and subtit the data for our review.
3.
Your response to this re:ocuendation is being reviewed by the Lessons Learned Lolrantation Task Force.
4.
Tour response to this recocnendation is acceptable.
C.
"ono Tem Reconrendattor.s 1.
Recom.endation GL-2 Tour response to this recomendation is not acceptable. Our recomendation was e,ct based solely on a passive piping system failure which is the basis for your resp:nse. Our recomendation was also based on failuna of the single nnnual valve er any other event that could result in flow blockage. You should either provide a redunda'nt path fmn the tank or provide an alternate long 'tenn source of water to the pumps.
2.
p.e omandation GL-5 Ycur r'esponse to this recomendation is currently under review.
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3-3.
Recommendation (Plant Specific)
Your response to this recommendation is acceptable pend?ng our acceptance of your alternate method of cooldown.
4 & 5.
Recomme'ndation (Plant Specific)
These items will be reviewed under the Systematic Evaluation Program.
D.
Basis for Auxiliary Feedwater System Flow Requirements (Enclosure 2)
Your May 15, 1980 commitment date to respond to this enclosure is acceptable.
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Enclosure to Attachment Revision to Recommendation No. 2 of ' Additional Short Term Reco=nendations" Regarding Auxiliary Feedwater Pump Endurance Test l
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The licensee should perform an endurance test on all AN system pumps. The test should continue for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after achieving the following test conditions:
- Pump / driver operating at rated speed and
- Pump developing rated dis' charge pressure and flow or some higher pressure at a reduced flow but not exceeding the pump vendor's maximum permitted discha'rge pressure value for a 48-hour test
. - For turbine drivers, steam temperature should b as close to normal operating steam temperature as practicable but in no case should the temperature be less than 400'F..
Following the 48-hour pump run, the pumps should be shut down and allowed to cool down until pu=p temperatures reduce to within 20*F of their values at the start of the 48-hour test and at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. have elapsed.
Following the cool down, the pumps should be restarted and run for one hour. Test acceptance criteria should include demonstrating that the pumps l
remain within design limits with respect to bearing / bearing oil tempera-tures and vibration and that ambient pump room conditions (temperature, humidity) do not exceed environmental qualification limits for safety-related equipment in the room.
s The licensee should provide a sumary of the conditions and results of the tests. The summary should include the following: 1) A brief description of the test method (including flow schematic diagram) and how che test
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2-t was instrumented (i.e., where and how bearing temperatures were measured).
- 2) A discussion of how the test conditions (pump flow, head, speed and steam temperature) compare to design opera-ing conditions. 3) Flots of hearing / bearing oil temperature vs. time for each bearing of each AFW pump / driver demonstrating that tamperature design limits were not exceeded. 4) A plot of pump room achient temperature and humidity vs.
time demonstrating that the pump room achient conditions do not exceed environmental qualification limits for safety-related equipment in the room. 5) A statement confirming that the pump vibration did not exceed
. 1 ellowable limits during tests.
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