ML19295C015
| ML19295C015 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/16/1974 |
| From: | Silver R US ATOMIC ENERGY COMMISSION (AEC) |
| To: | US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8010150718 | |
| Download: ML19295C015 (5) | |
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n-I t-AUG 161974 F
Docat No. 50-10 I
APPLIChiT:
C012:0a%ALTH EDIS0d.c:PANY FACILITf:
DPISDEN 1 HUCLEAR POWER STATION MEETISG SUr2 ARY OF JULY 18,1974 - VARIR1CE TROM THE AEC INTERIH ACCEPTANCE CRITERIA (IAC) p Coc:aonwealth Edison Company (CE) representatives met with AEC-Licensing representatives in Bethesda, Maryland on July 18, 1974 to review:
1.
The schedule for completion of modifications at Dresden 1 to satisfy the AEC-IAC of June 1971.
E 2.
The primary coolant system boundary inservice inspection program at I
Dresden 1.
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The prirary system coolant system boundary leak detection capability at Drcaden 1.
I Scht.dule h
Inc schedule for installation of the high pressure coolant injection system has slipped. Because of delays in obtaining design paraceters, the earliest coupletion date is now estimated to be September 1,1976, rather than the January 1,1976, date originally estinated.
CE stated that an acendu.cnt to tac June 10, 1974, request for variance would be submitted which would luc %de the new coupletion date and a bar chart schedule.
CE stated that a GC design ct.udy expected from General T.lectric (GE) in October 1973 was not receivd. from GE until May 1974 because of canpower cent traints at GE.
As a result, the design pararoters needed by Sargent &
Lundy, the architect-engineer, for drawing up the bid docuuents were not provided to Sargent & Lundy until cid June 1974.
De purpose of the design study was to conservatively entir_ ate the HPCI design characteristics needed i
to tect tne require mnts of tae Acceptance Criteria (10 CFR 50.46). As a result of thc. design study, ti.e 12CI pump runout conditions were revised which clso required revisions to piping requirements.
(Lach UFCI pump will still be sized for 1000 3pu at full pressure but will have a runout condition of 5000 gen at 100 poig.)
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From this date onward, the schedule is constrained by the long delivery timos for pumps and totor operated valvea.
CE stated that notor control i
centers and switchgear would also constrain the schedule. CE is following their standard procurement procedure.
In their opinion a single source award would not save time and would not be justified.
CE stated that if the AEC were to require a second onsite diesel and battery, installation could be con:pleted at the same tinc as the IIPCI con-piction.
Installation could not be coupleted sooner than September 1976 l
because of long delivery times for panels and switchgear.
The staf f informd CE that we would want a safety analysis report for the IIPCI system submitted to the AEC.
C6 estimated that such a report could be submitted within a few months.
Inservice Inspection Program t
CC is performing its inservice inspections at three times the frequency required by its proposed Techniccl Specifications and Section XI of the AS!!E Eoiler and Pressure Vessel Code.
CE has nov coupleted two of the three inspections required to cotplete the inspection cycle in 31/3 years. Jo indications of cracks in the primary coolant system piping have r
been found.
. Leak,,Detec_t_.Gon Capability CE reviewed tne Dresden 1 leak detection system design and capability.
The systeu consists of a continuous air monitor (C.VI) for sphere exhaust radioactivity, a continuous air waitor for radioactivity on the rain floor and a dew point sarpling system with c:ultiple sampling points.
CE informed us that two cample points were added to inprove the saepling syatea during the last outage. CE stated that the CAli systems have proven to be the cost sensitive Icak detection systems with a caphbility to detect leaks as low as about 2 milliliters per ninute. CE stated that leak de-taction system capability, proven by experience with several very small leaks, is far better than the typical requirement that a 1 cpm leak rate be detectable within one hour.
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- l' Other Inforuation i
1.
The cost of the planned itPCI systcu is estimated to be at least
$2,250,000. Adding redundancy to the diesel and battery systens is estimated to cost an additional $1,000,000.
i 2.
The Dresden station lost all offsite power once, during the late 1960's.
The cause was a tornado which crossed the single right-of-way, nor' h of the station, for the five 138 kv lines. Ilovever, since that t
event, a sixth line has been added with a rignt--of-way extending south of the station.
It la CE's opinion that the addition of this line significantly decrease the vult.creility of the station to a loss of offsite power caused by a single event.
A lict of attendees is attached.
i Richard D. Silver Operating Ecactora Branch E2 Directorate of Licensing
Enclosure:
Attendance List g...
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l ATTENDNiCE' LIST
_C012D:NEALTU EDISON COITX.T - DPJSDEN 1 PJ.ETING OF JULY 18, 1974 CO)2D.NEALTH EDISON COMPAliY J. S. Abel
- 11. Lee, Jr.
L. DelGeorge L. W. Raney J. L. Watts D. P. Dalle
_SARGENT & LUJDY V. 3. Shastri Annal:bhotia F. Spakoski
_AE_C - STAFF I
R. D. Silvdr K. iloge S. Varga D. L. Zienaan A. L. Gluckcann it. Pollard D. Tilatcher V. Rooacy orases >
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Forns AIC-)ls (Rev. 9 3 3) AECM 0240 W u. s. o ov s a= u s M7 P a'**Tiaa o' F'C E' s e re.s as.s ee
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DISTRIBUTION FOR MEETING REPORTS Docket File AEC PDR Local PDR L Reading File Eranch Reading File RP Assistant Directors RP Branch Chiefs T. J. Carter J. M. Hendrie TR Assistant Directors TR Branch Chiefs R0 (3)
RS (3) ocC R. Fraley, ACRS (16)
Principal Staff Participants i:
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