ML20003A624
| ML20003A624 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/30/1981 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8102040438 | |
| Download: ML20003A624 (3) | |
Text
.
BALTIMORE GAS AND ELECTRIC COMPANY
~
P. O. BOX 1475 B A LTI M O R E". M ARYLA N D 21203 January 30, 1981 ARTHUR [. LU N DVA LL. J R.
Vect PassictN' su m, Mr. D. G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation U. S. Nuclear Pegulatorv Commission Washington, D. C.
20555
Subject:
Calvert Cliffs Nuclear Power Plant Units Nos.1 & 2, Dockets Nos. 50-317 & 50-318 Fire Protection Modifications
Dear Mr. Eisenhut:
Our most recent status retorts to you on fire protection modifications were on 9/26/80 and 12/29/80. We nov find that we must change our previously forecasted co=nletion dates l ased on a recent review of the status and schedule of work remaining on items to which we co=mitted prior to the issue of Apnendix R.
Major reasons for the extended schedules are:
- 1) Previous estimates were overly ottimistic and did not cive adeauate consideration to the i=nact on fire protection jobs of the unusually large volume of plant maintenance and mod-ification vork (including many regulatory reauirenents and commitments to NRC) Foing on during the outage. ?Jany areas were mantover-saturated for significant neriods of tbne.
In addition, total on-site manpower levels reached the limits of site support canability (e.g. radiation control, work package preparation, administrative sunport) for most of the Unit 1 outare, and are expected to be at least as intense during the Unit 2 outage.
- 2) The complexity and extended length of the Unit 1 outage (completed 1/10/31, about three weeks later than planned) had the effect of detracting manpover from fire protection vork, and greatly decreased the amount of work that could be done between the end of the Unit 1 outage and the beginning of g)g)(
the Unit 2 outage on 1/17/81.
- 3) Detailed planning of testing of fire protection systems (primarily Halon and detection systems) indicates that its
/ /
conolexity and duration vere previously underestimated. Testing is ' further complicated by the fact that it vill occur for the nost part during outage pericds, when it must compete with maintenance and modification sc-k for space access and manpower.
[
810204o y g O
' O
Mr. D. G. Eisenhut Page 2 January 30, 1981 The attached schedule shows both estimated concletion dates for construction (which includes oreliminary installation testing), and the dates for comnletion of full operational testing. Dates assume no further enanticipated si.7nificant problems d' iring installation, and no deficiencies pointed out by testing that require ma.jor modifications or extensive retesting.
It should be noted *. hat systems vill, for the most part, be functional upon comnletion of installation, but cannot be declared fully oeerational and ce=clete until all testing is completed satisfactorily.
'"herefore, some significant protection is actually being provided by most systems prior to testing. In addition, the installation dates shown reflect only the last portion of the entire system, while portions of systems are being phased into service where possible as they become complete; this is of carticular significance in the automatic sprinkler system, where approximately 75% of areas to be sprinkled are already connlete and functional thouch not fully tested.
Based on all of the above, we request an extension of connletion dates for fire protection modifications in accordance with the attached schedule. We vill continue to keep you info'med of the status of these items, and will be hapny to discuss them vita you if you have any questions.
Very tr -ly yours,'
j.
,,n_.,
.~.
cc:
J. A. Biddison, Esquire G. F. "'rowbridge, Esquire Mr. E. L. Conner, Jr.
- mC
i Attachment to A. E. Lundvall Letter of January 30, 1991 Revised Schedule for Innlementation of Fire Protection !!odifications (Excluding Requirements Added by Aupendix R)
SER Fstimated Comnletion Item Descrintion Unit Installation Testing 3.1.6 Halon in Cable Spreading Room 1
2/16 3/16 4
(79-102h) 2 2/16 3/16 3.1.13 Communications 1
Complete Complete (79-101) 2 2/ 9 2/37 3.1.19' Detection (excluding final 1
2/16 3/13 tie-in to sprinklers) 2 3/ 2 h/ 6 (79-1025) 3.1.21 Fire Hose Coverage 1
Complete Conclete (79-1022) 2 2/ 9 2/17 3.2.1 Sprinklers 1
2/23 5/25 (79-10h9) 2 5/11 5/25 3.2.1 Halon in Switchgear Rooms 1
h/ 6 5/18 (80-1027) 2 h/ 6 6/ 1 3.2.h Fire Walls and Dam ers 1
2/23*
h/13 (79-1052) 2 3/ 2 h/20 332 Energency Lighting 1
Conplete Complete (79-1050) 2 2/17 2/23 3.3.h RCP Lube 011 Collection 1
Comnlete complete (79-1023) 2 3/ 2 3/ 9
'One penetration room fire damner vill be installed during the next scheduled shutdown in which Mode h conditions are met, currently anticipated to occur around h/1/81.