ML19321A480

Forwards Fire Protection Mod Schedule,Per NRC 800702 Request.Requests Approval.Seven Mods Have Completion Dates After 801101

ML19321A480
Person / Time
Site:	Sequoyah
Issue date:	07/17/1980
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 8007230499
Download: ML19321A480 (15)

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400 Chestnut Street Tower II July 17, 1980 Director of Nuclear Reactor Regulation Attention: Mr. D. G. Eisenhut, Director Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Eisenhut:

In the Matter of the ) Docket No. 50-327 Tennessee Valley Authority )

Enclosed for your review are 41 copies of the documentation requested by your staff during the TVA-NRC meeting on July 2, 1980, concerning the fire protection modification schedules for the Sequoyah Nuclear Plant unit 1.

As stated in Enclosure 1, there are seven modifications with completion dates after November 1, 1980. TVA considers these modifications as enhancements to the defense in depth concept, none of which are required to ensure safe shutdown of unit 1 in the event of fire. Three of the modifications are related to protection of a system, the Essential Raw Cooling Water System, which is not required for unit 1 operation. Three of the modifications are improvements on existing fire protection design )

features which are made to enhance safety. One of these modifications, cable coating of additional cables, will be done according to the NRC staff criteria for addition of cables during the operation of any nuclear plant.

If the NRC staf f does not concur in the TVA position t'.at each of these seven fire modification schddules are acceptable without a formal excep-tion to GDC 3 of Appendix A to 10 CFR Part 50, TVA hereby asks for an  ;

approval of schedule of these modifications as stated in Enclosure 2. l Very truly yours, l

TENNESSEE VALLEY AUTHORITY j

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L. M. Mills,. ager k# .

Nuclear Regulation and Safety k )

Enclosures 1

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Tms DOCUMENT CONTAINS POOR QUgtgg PAGES 8007230997 "

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• EMCLOSURl; I

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S13!UOYAll NUCLEAR 'PIANT

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JUSTIFICATION FOR COMMITMENT COMPLETION DATE BEYOND NOVEMBER 1, 1980

- Act. i nri 'or M<xli fication Requirmt Junt.l fica t ion

1. (a) Enclose exposed _ conduit Interim protective measure identified ira Table 1.4 provided through the availability of the auxiliary with a 1-1/2-hour fire essential raw cooling water barrier.

(AERCW) system as backup to ERCW system.

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(b) Reroute train B ERCW pump power cables and ERCW xfmr power cables from top of -

ERCW J-box to obtain minimum 20 feet separation from train A.

(c) Enclose ERCW junction box with 1-1/2-hour fire barrier.

3.B (ii) Install additional fire dampers Five dampers involved, four in required as a result of NRC concerns the control building at elevation of February 12, 1979, meeting. 685 and one in the auxiliary building associated with the refueling purification filter room. Those in the control building do not pose a threat to safe plant ehutdown due to the provision of the backup control room and the establishment of emergency operating instruction (E0I-7).

The single damper from the refueling purification filter rooms poses no threat to safe plant shutdown. The filters

• are required only after shutdown, ,

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during refueling operations or fuel transfer. .

3.B (iii) Coat'the metal barrier plate in TVA tests have demonstrated than l cable tray penetrations with the as-installed cable tray l pyrocrete. penetration seals provide a fire l resistive rating consistent with  !

the designed rating of the l penetrated barrier itself. l t

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Table 1 JUSTIFICATION -FOR COMMITMENT COMPLETION DATE BEYOND NOVEMBER 1, 1980 Action or Modification Required Justification

4. ' Coat exposed surfaces of cables Approximately 95 percent of all with flame retardant material cabling requiring coating in in areas outside primary unit 1 and comt:0 areas has been containment containing one or both coated and is continuing as safety-related divisions. additional cable is installed.

The completion date of 12/20/81 reflects cable coating requirements resulting from modifications for unit 1, i.e., .

nit 2 reactor building annulus.

9.D Provide additional sprinkler heads Installation of additiona.1 or relocate existing heads to clear sprinkler heads has been overhead obstructions. completed in the more sinnificant areas of concern by the staff reviewers, i.e., area beneath mezzanine around the component cooling water pumps, the ERCh' junction box, and the motor-driven auxiliary feedwater pumps.

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The relocation of existing heads to clear overhead obstructions and provisions of additional sprinkler heads for the remaining plant areas will require a case-by-case field inspection and resolution.

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FURTHER JUSTIFICATION AND COMMENTS TVA believes the presently implemented Sequoyah Nuclear Plant Fire Protection Program to be in compliance with General Design Criterion 3 of Appendix A to 10CFR, Part 50, without the implementation of those commitment items listed in table 1 before November 1, 1980. TVA considers these items as enhancements to the defense in depth concept, none of which are required to assure safe plant shutdown in the event of fire.

Items 1(a), 1(b), and 1(c) are intended to assure availability of the ERCW pumps for a period sufficient to allow the fire brigade to control and extinguish a fire in the area of the affected circuits assuming the installed automatic suppression systems fail to operate as designed. TVA has provided the auxiliary essential raw cooling -

water system (AERCW) as a backup to the normal ERCW system and developed procedures (SOI 67 2) for its alignment and use in the event the normal ERCW system is unavilable due to fire damage. A description of the AERCW system is provided in the Sequoyah FSAR, Section 9.2.2.

This approach is consistent with item 2 3 of the staff requirements, i.e. , "where modifications will not be implemented for an extended period, interim protection measures should be required to compensate for the lack of protection."

Item 3.B(ii) is intended to minimize fire damage to the main control room complex and one area of the auxiliary building by the provision of four additional fire-rated dampers in the unit 1 and unit 2 auxiliary instrument rooms and one additional damper in the auxiliary building refueling purification filter rooms. The provision of thesc

' dampers is not essential for safe plant shutdown in the control builcing auxiliary instrument rooms because, as indicated in the response to ASB question 18, the auxiliary control roem complex and

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' corresponding Emergency Operating Instruction E0I-7 provides for safe plant shutdown should the main control room, cable spreading room, ror the auxiliary instrument rooms become damaged as a result of fire.

The refueling purification filters are required only after shutdown, during refueling operations or fuel transfer.

Item 3.B(iii) - TVA's response to ASB question 3.B(111) provides a

, detailed description of the Sequoyah electrical penetration fire stops for cables and cable trays and the tests conducted to qualify the penetrations. The staff's Safety Evaluation Report - Supplement No. 1 dated February 1980 (NUREG-0011, Supplement 1), Section 9.5 III B, states that the construction features of the electrical penetrations have been reviewed and that the staff had concluded that the applicant has provided tout documentation to demonstrate the fire resistivity of the electrical penetrations. However, the* staff requested that the bare steel plate in the cable tray penetration seals be coated with a fire resistent coating equivalent to the fire barrier rating, _.Lo provide increased annurance of protection. TVA agreed that,in loin of further discussion of test docunentation and in the-interest ,

of defense in depth, TVA vould agree to provide such a coating as soon as possible.

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TVA ius concluded that no threat to safe shutdown capabilltr. exists as a renuit of the installation of fire-renistive coatinns not beenin; applicd 1-v ;iovembor 1, l'8M.

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Item 4 - Approximately 95 percent of all installed exposed cablins requiring coating in unit 1 and common areas has been coated. The 5 percent'which is installed and not yet coated represents those.

cables numbering less than 10 in a single tray run. The 7aC staf f previously agreed that up to 10 additional cables within any single tray run can be added before additional coating is required. The December 10, 1981, completion date for this item reflects cable coating renuirenenta resulting from nodificatione, associated with unit 1, i.e.. anythine from T!!I, and relating to unit 2 specific areas. based on the above discussio:1, this cotmitment is complete for those areas pertainin;; to unit 1 operation.

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Item 9D - The installation of additional sprinkler coverage for the area under the mezzanine for all component cooling water pumps, under the pipe break barrier for the auxiliary feedwater pump, and the area around the ERCW box has been completed. These were the areas of greatest concern to the NRC staff during the site review.

The relocation of existing heads to clear overhead obstructions and provision foradditional sprinkler heads for the remaining plant areas will require a case-by-case field inspection and resolution. The philosophy for the design of the sprinkler systems at' Sequoyah including the location of individual sprinkler heads was to afford maximum protection for exposed cabling. During NRC-sponsored tests conducted at Sandia Laboratories it was determined that internally generated cable fires do not propagate to adjacent trays provided that Regulatory Guide 1 75 separation is maintained and cable meeting the fire-retardant requirements of IEEE 383 is used or non-IEEE 383 cable with an approved fire-resistive cable coating is used. The results of the Sandia tests have deemphasized the importance of .

providing maximum water coverage to exposed cable surfaces and shifted the emphasis. to providing maximum water coverage to the floor area beneath cable runs in an attempt to deal with the exposure fire

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potential, both installed and transient.

TVA agrees with this more recent philosophy and has committed to relocate existing heads and/or provide additional heads to provide clear coverage to the floor area to the degree practical.

However,.TVA feels that:the as-installed sprinkler systems provide adequate protection to the circuits and equipment they were designed to _ protect and, in the event of an exposure fire resulting from installec (n transient combustibles, that these circuits and equipment will be protected for a sufficient period to allow the fire brigade l to extinguish the exposure fire using the manual equipment provided.

Therefore, no threat to safe shutdown capability exists in the interim period betore compiction of this cotuaitment.

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SEQL'OYAH NUCLEAR PLANT FIRE PROTECT 20N SCHEDULE HISTORY TVA first submitted a proposed schedule for the completion of all modifications resulting from c:3==itments made in our submittal of

- January 24,' 1977, those result.ng from nonconfor=ance report SWP-78-S-2, and those resultin g from TVA responses to Auxiliary Syste=s Branch Fire Protection Review Questions by letter from J. E.

Gilleland to S. A. Varga dated March 8,1979 (See schedule 1, attached.) This schedule was based on an estimated fuel load date of July 1, 1979, and was reviewed and approved by the staff. -

TVA revised the above schedule on October 19, 1979, to reflect an estimated fuel load date of December 1979 and submitted the new schedule as a part of revision 4 to TVA responses to ASB Fire .

Protection Review Questions by letter from L. Me Mills to L. S.

Rubenstine dated October 23, 1979 (See schedule 2, attached.) This schedule was based on an estimated fuel load date of December 1,1979 t TVA revised the schedule a second time to reflect an actual fuel load date of March 1, 1980, and to reflect additional schedule slippages resulting from the inclusion of some TMI-related modifications. The new schedule also reflects actual completion dates for the mjority of. items .as well as a change in the commitment relating to ASB Question 1. The method of protecting the ERCW power circuits has been changed. This schedule was submitted by letter fren L. M. Mills

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to L. S. Rubenstein dated June 11, 1980. (See schedule 3, attached.)

TVA believes the new schedule is consistent with the previously approved schedulen considering the slippage in fuel load date and the inclusion of TMI-related modifications and reflects our original intent to complete the remaining fire protection modification ,

commitments as soon after initial fuel load as is practical. -

Justification for completion of the remaining seven uncompleted commitment modificatior.s, three of which relate to the protection of the essential raw cooling water (ERCW) system power circuits, beyond November 1, 1980, is provided in table 1 (attached).

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.t PONSG TO ASli QUESTIONS IIASED ON ESTI!!ATED FUEL LOAD DATE

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SCHEDULE FOR COWIITME!1TS

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All modifications resulting from commitments made in our submittal of ,

January 24, 1977, shall be impicmented prior to the initial fuel icading

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TVA proposes to impicment modifications resulting from faonconformance Report SUP-78-S-2 and from commitments made in this docu ent per the follouing schedule:

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ASB D: sign Construction .

(c.Tpletion Completien l

- (f.testion Date Date -

I:0. Action or !bdification Pequirgd 1 Rercute conduit and cable identified

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G/30/79 9/30/79 in Tabic 1.2. See note 1 Urap instrusentation conduit identi- 6/30/79 9/15/79 fied in Table 1.3 with 1-inch-thick Kaowool Blanket.

En[loseexcosedconduitidentifiedin 7/ 31 /75 11/30/79

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Tatile 1.4 with a 1-1/2-hour fire barrier.

Develop casualty procedurcs to bring 8/ 31 /7 9 12/31/79 plant to safe cold shutdown with fire damageLto cabling identified in Table 1.5.

Enclose cables identified in Figure 7/31 /7 9 11/30/72 1-2 with a 1-hour fire barrier con-

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sisting~of 2-inch-thick Kaowool M Board.

Install additional. fire doors iden- - See note 2 3B(i) tified in t:onconformance Report

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SWP-73-5-2.

Install remaining fire doors iden- - See note 2

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tified in Tchic 3B(i)-3. '

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~3B(ii) Install additional fire dampers - See note 2 identifed in lionconformace Report SWP-78-S-2. .

Install remaining fire dampcrs iden- 6/30/79 8/31/79 tified in; Table 3B(li)-3.'

' Add pyrocrete to fire dampers PCO -

_ See note 2 17A and 0-31 A-14B.

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' Construccion

- Design ASB Completion Comple tim Question Date Isa t e

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Action or Ibdification Requi_re_d, 1

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3B(iii). Coat the rnetal barrier plate in cabic 6/30/79 tray penettations with pyrocrete.

6/30/79 See note 3 4 Coat exposed surfaces of cables with finme retardant material in areas

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one or both safety-related divisions.

Install fixcd self-contained If ghting 7/ 31/79 12/31/79 6

in arcas that riust be manned for safe cold shutdown and for access and cgress .

routes to and from all fire arcas.

Electrically supervise the fire protec- 7/31/79 10/31/79 7

tion power distribution panel for

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loss of pouer. .

Electrict11y supervisc the fire pumps 7/ 31/79 10/31/79 8

for icss of line pouar end motor running condition.

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Prov'ide additional sprinkler heads 8/31/79 See note 3 9D -

or reloccie entsting heads to cicar overhead obstr uctions.

Enciese ERCil junction box with 1-1/2- 7/31/79 9/30/79 11B ~

hour fire barricr.

7/ 31 /79 9/30/79 Provide e 1/2 hour fire barrier of 1-inch 1:w.: cal I;1ontet between re-dundtnt power cebles in the ERCil junctionbox.

Provide i.utomatic sprinkler protec- 7/ 31/71 3/31/00 13B u tion under the pipe break barrier -

for the auxilicry feedwater pumps.'

' Provide automatic sprinkler protec- 7/ 31/79 3/31/80 13C.

tion under the rezzanine for all component cooling water pumps.

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. Provide a 1/2-hour fire barrier 7/ 31/79 3/31/00 13D

- between train A and D component cooling uater pumps.

Provide.cdditional smoke detectors to 7/ 31/79 3/31/00 13F-actuate tha sprinkler systems.in TVA

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responses to questions 138 and 13C.

Provide heat detectors in the Eittil 7/ 31/79 10/31/79

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pump rooms of the intake pumping station.

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SCllEDl'LE 1 (continued) f 2

w ASD Design Construction Completion Completion Question Date flo. Action or !!ortifir.ation I:cquired _ Date 16 l' ovide Ig.it .1.u m an,I annunt.iation for 7/31/79 11/30/79 loct-out of diesel generator room and board room C02SYSIC*S*

17A P.emove sliding fire doors for 8/31/79 10/31/79 diesel generator rooms and replace with normally closed fire doors.

20A Replace the translucent panels in -

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Sec note 3 I!CR with material that meets the -

guidelinesofsectionC.4.a(4)of Revision 1 to BTP 9.5-1.

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200 Replace the existing 1/2-inch riser 7/ 31/79 9/30/79 nipples with 1-inch nipples in the records storage area.

26 Provide equip. Tent for fire equipment 7/31/79 10/31/79 houses.

. 21 Relo'cate fire pump separation relays 0/ 31/79 1/31/80 to achieve 20-foot spatial separation.

- Install curbs at doors to transfer 6/30/79 7/31/79 switch rooms of the cuxiliary control compiex. ,,

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1. Construction completion date is based on arstmptior, that five days will be available at operation node 5 or 6. .

2. Prior to initial fuel loading of the associated unit. .

3. End of first refueling outage for unit 1.

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SCl;EDULE 2

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RLY1SinN 4 Or 'lVA RESPONSES TO ASB QUESTIUNS BASED ON ESTI!!ATED FUEL LOAD DATE

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SCllEDULE FOR C0'411TMEllTS

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All modifications resulting from conditments made in our submittal of January 24, 1977, shall be implemented prior to the initial fuel loading of the associated unit.

TVA proposes to implement r.:odifications resulting from rionconformance Report S!IP-78-5-2 and from commitments made in this document per the following schedule:

ASB Design Construction Question Completion Completion

!!o. Action or Modification Required ,

Date Date ,

1 Reroute conduit and cable identified 7/9/79 10/5/79 in Table 1.2. (unit 1) 7/9/79 See note 1 (unit 2)

!! rap instrumentation conduit identi- 5/9/79 10/5/79 fied in Table 1.3 with 1-inch-thick (unit 1)

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Kaowool Blanket. 7/9/79 See note 1 (unit 2)

Encicse exposed conduit identified in 12/1/79 4/1/P:

Table 1.4 with a 1-1/2-hour fire

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barrier.

Reroute units 1 and 2 pressurizer 5/7/79 10/5/79 htr 6900Y power cables to achieve 20 feet spatial separation. .

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3B(i). Install.. additional fire doors iden- 3/6/79 See note 1 tified in ionconformance Report

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' Install remaining fire doors iden- 3/6/79'

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See note 1 tified in Table 3B(i)-3. ,

. l Ins';all additional fire dampers

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3B('ii) 3/6/79 Sae note 1 ide1tifed in !!onconfont. ace Report SWP 78-5-2. l

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Install remaining fire dampers'iden- 6/26/79 10/5/79 tifiedinTable3B(ii)-3.

1 Add lpyrocrete to fire dampers PC0 3/7/79 10/5/79 l 17A and 0-31A-148. ',,

. Install additional fire dampers . 12/31/79 See. note 2 required as result of I!RC concerns of february 12,1979, meeting.

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ASB Design Construction

• Completion Completion Question flo. Action or Modification Required Date Date 3B(iii) Coat the metal barrier plate in cable 12/1/79 4/1/

tray penetrations with pyrocrete.

4 Coat exposed surfaces of cables with 12/1/79 See note 2,3 flame retardant material in areas

• ou; side primary containment containing one or both safety-related divisions.

6 Install fixed self-contained lighting 7/10/79 10/5/79 in arcas that must be omnned for safe cold shutdown and for access and egress - '

routes to 'and from all fire arcas.

7 Electrically supervise the fire protec- 7/9/79 11/7/79 tion power distribution panel for .

loss of power.

8 Electrically supervise the fire pumps 7/9/79 11/7/79

'for loss of line power and motor running condition. - . .

9D Provide additional sprinkler heads 3/31/80 See note 2

. or relocate existing heads to clear overhead obstructions. i 11B Enclose ERCU junction box with 1-1/2- 12/1/79 2/1/80 hour fire barrier.

Pr5videa1/2-hourfirebarrierof 6/29/79 10/5/79 l-inch I'aowool Blanket between re-dundant power cables in the LRCW junction box.

13B Provide automatic sprinkler protec- 7/9/79 10[5/79 e <

tion under the pipe break barrier for the auxiliary feedwater pumps.

13C. Provide automatic sprinkler protec- 7/17/79 10/5/79 tion under the mezzanine for all component cooling water pumps.

13D 1:rovide a 1/2-hour fire bar.icr 7/9/79 10/5/79 between train A and B component cooling water pumps. ,

13F. Provide additional smoke. detectors to 7/9/79 10/5/79 actuate the sprinkler systams in TVA  ;

responses to questions 13b .nd 13C.

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SCl!EDULE 2 (continued)

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Design Construct on ASB. Completion

- Completion Question Date Date No. Action or Modificatinn Required 16 Provide MCR alarm and annunciation-for 7/9/79 10/5/79 lock-out of diesel generator room and-board. room CO 2 systems.

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17A- Remove sliding fire doors.for 12/1/79 2/l/80 diesel generator rooms and replace

'with-normally closed fire doors.

.20D . Replace the existing 1/2-inch riser 6/21/79 9/21/79 nipples with 1-inch nipples in the ,

records storage area.

26' Provide additional equipment for 8/10/79 10/16/79

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fire equipment houses.

27 Relocate fire pump separation relays 7/9/79 11/7/79 to achieve 20-foot spatial separation.

- Install curbs at doors to transfer 6/20/79 10/5/79 switch rooms of the auxiliary control compicx.

Notes: ,

1. Prior'to initial fuel loading of the associated unit.

2. End of first refueling outage for unit 1.

3. Cable' coating is progressing. Areas identified in submittal of January 4,1977, will be completed prior to initial fuel loading. .

of the associated unit.

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' JUNE 11, 1980 - SCHEDULE BASED ON ACTUAL TUEL LOAD DATE OF MARCH 1,1980

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- SCHECdLE FOR C0mlTMEllTS

-All modifications resulting from coamitments made in our submittal of January 24, 1977, shall be icp'.amented prior to the initial fuel loading of the associated unit. ,

TVA proposes to implement modifications resull[ng from !!onconformance Report SWP-78-5-2 and from commitments made in this document per the following schedule:

Design Construction ASB Completion . Completion Question Date Date No. Action or Modification Required .

l' Reroute conduit and cable identified 7/9/79* 10/5/79* -

in Table 1.2. (unit 1) 7/9/79* See note 1 (unit 2)

Wrap instrumentation conduit identi- 7/9/79* 10/5/79*

ficd in Table 1.3 with 1-inch-thick (unit 1)

Kaowool Blanket. 7/9/79* See note 1 (unit 2)

Encle:e exposed conduit idantified in. 9/1/80 6/30/81 Table 1.4 with a 1-1/2-hour fire barrier. __

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Reroute units 1 and 2 pressuri:cr 7/7/79* 10/5/79*

htr 6900V po,er cables to achieve 20 feet spatial separation.

Reroute train B ERCH pump power cables 8/1/80 4/30/81 and ERCH xfmr power cables from top of -

ERCW J-box to obtain minimum 20 ft.

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separation frem train A.

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3B(i) Insta 1 additional fire doors iden- 3/6/79* 11/15/79*

tified in f!onconformance Rcport SWP-78-S-2.

Install remaining fire doors iden- 3/6/79* 11/15/79*

-tified in Table 3B(i)-3. ,

3B(ii) Install additional fire 6 mpers 3/6/79* 11/15/79*

identified in lionconformance Report-SUP-78-5-2.

, Install remaining' fire dampers iden- 6/26/79* 10/5/79*

tified in Table 33(11)-3.

Add pyrocrcte to fire. dampers PCO 3/7/79* 10/5/79*

17A and 0-31 A-148. .

Install additional fire dampers 10/1/80 11/1/81 required as result of NRC concerns of

. -February 12, 1979, meetin9

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ASB Design Construction

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• Completion Ccmpletion

. Question Date Date tio. Action or Modification Recuired

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Coat the metal barrier plate in cable 8/1/80. 10/31/81 3B(iii) tray penetrations with pyrocrcte.

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4 Coat exposed surfaces of cabics with 7/1/00 12/30/81 flame retardant material in areas #

outside primary containment containing

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one or both safety-related divisions.

6 Install fixed scif-contained lighting 7/10/79" 10/5/7.o

• in areas that must be manned for safe cold shutdown and for access and egress routes to and from all fire areas.

7 Electrically supervise the fire protec- 7/9/79* , 11/7/79*

tien p0wer dlstribution panel for loss of power. ,

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8 Electrically supervise the fire pumps 7/9/79* 11/7/7S* ,

for loss of line power and motor running condition. ,

90 Provide additional sprinkler heads 10/1/80 11/1/S1 or relocate existing heads to clear overhead obstructions.

11S Enclose ERCW junction box with 1-1/2- 9/1/80 6/30/53 hour fire barricr. ^

Provide a 1/2-hour fire barrier of 6/29/79* 10/5/PIF*

l-inch Keowool Blanket between re-dundant power cables in the ERCW .ws junction box. ,

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133 Provide automatic sprinkler protec- 7/17/79* 10/5/73*

- tion under the pipe break barrier for the auxiliary feedwater pumps.

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13C Provide automatic sprinkler protec- 7/17/79* 10/5/79*

tion under the mezzanine for all component cooling water pumps.

13D Provide a 1/2-hour fire barrier 7/17/79* 10/5/79*

between train A and B com;;acnt cooling water pumps.

~13F Provide additional smoke detectors to 7/17/79* 10/5/79*

actuate the sprinkler systems in TVA -

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responses to questions 13B and 13C.

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SClllCDt!LI, 3 (continueil)

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Design- Construction A50 Completion Completion Question Date Date No. ~ Action or Modification Recuired ,

Provide MCR alana and annunciation for  ?/9/79* 10/5/79*

16 lock-out of diesel generator room and ' '

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board room C02 systems.

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Remove sliding. fire doors-for 2/12/80* 8/1/80 17A diesel generator rooms and replace

• with normally closed fire doors.

Replace the existing 1/2-inch riser 6/21/79* 9/21/79*

203 nipples with 1-inch nipples in the records storage area.

Provide additional equipment for 6/5/80 6/10/80 .

26' fire equipment houses. ,

27 I:clocate fire pump separation relays 7/9/79*

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to achieve 70-foot spatial separation.

- Insta11 curbs at doors to transfer 6/20/79* 10/S/79*

switch rooms of the auxiliary control complex.

Notes _:

1. Prior to initial fuct loading of the associa'ted unit.

• Indicates actual finish date. .

.

.

g 9 *

.

44

. I e

. ..

. l

-

.

7A1101" . .- -.- . --