ML102530535

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Lr - Draft RAI Set 7 Scoping and Screening - Fire Protection
ML102530535
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 06/08/2010
From:
Office of Nuclear Reactor Regulation
To:
Division of License Renewal
References
Download: ML102530535 (5)
v • d • e


Text

DiabloCanyonNPEm Resource From: Ferrer, Nathaniel Sent: Tuesday, June 08, 2010 4:50 PM To: Grebel, Terence; Soenen, Philippe R Cc: Green, Kimberly; DiabloHearingFile Resource

Subject:

Draft RAI Set 7 Scoping and Screening - Fire Protection Attachments: Draft RAI Set 7 Scoping and Screening Fire Protection.doc Terry and Philippe, Attached is Draft RAI Set 7 containing draft RAIs, specifically on scoping and screening of fire protection system and components. Please review the attached draft RAIs and let me know if and when you would like to have a teleconference call. The purpose of the call will be to obtain clarification on the staff's request.

Please let me know if you have any questions.

Nathaniel Ferrer Project Manager Division of License Renewal Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission (301)4151045 1

Hearing Identifier: DiabloCanyon_LicenseRenewal_NonPublic Email Number: 1190 Mail Envelope Properties (Nathaniel.Ferrer@nrc.gov20100608164900)

Subject:

Draft RAI Set 7 Scoping and Screening - Fire Protection Sent Date: 6/8/2010 4:49:44 PM Received Date: 6/8/2010 4:49:00 PM From: Ferrer, Nathaniel Created By: Nathaniel.Ferrer@nrc.gov Recipients:

"Green, Kimberly" <Kimberly.Green@nrc.gov>

Tracking Status: None "DiabloHearingFile Resource" <DiabloHearingFile.Resource@nrc.gov>

Tracking Status: None "Grebel, Terence" <TLG1@PGE.COM>

Tracking Status: None "Soenen, Philippe R" <PNS3@PGE.COM>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 591 6/8/2010 4:49:00 PM Draft RAI Set 7 Scoping and Screening Fire Protection.doc 44538 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

Diablo Canyon Nuclear Power Plant, Units 1 and 2 (DCPP)

License Renewal Application (LRA)

Draft Request for Additional Information Set 7 Scoping and Screening - Fire Protection D-RAI 2.3.3.12-1 License renewal boundary drawing LR-DCPP-18-106718-02 shows several fire water suppression systems associated with various transformers (e.g., main, auxiliary, and standby/startup transformers) as not within the scope of license renewal (i.e., not highlighted in green). Section 9.6.1 on page 9-8 of the NUREG-0675, Supplement 8, Safety Evaluation Report related to the operation of Diablo Canyon Nuclear Power Plant, Units 1 and 2, dated November 15, 1978, states that: Special protection water system are provided for the fire hazards which exist in the areas around the plant. Examples of these are dry pipe deluge spray system for main transformers, auxiliary transformers The staff requests that the applicant verify that the fire water suppression systems associated with various transformers are in the scope of license renewal in accordance with 10 CFR 54.4(a) and subject to an AMR in accordance with 10 CFR 54.21(a)(1). If they are excluded from the scope of license renewal and not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.

D-RAI 2.3.3.12-2 License renewal boundary drawing LR-DCPP-18-106718-03 shows jockey pump and its associated components as not within the scope of license renewal (i.e., not highlighted in green). The jockey pump and its associated components appear to have fire protection intended functions required for compliance with 10 CFR 50.48 as stated in 10 CFR 54.4. The staff requests that the applicant verify that the jockey pump and its associated components are in the scope of license renewal in accordance with 10 CFR 54.4(a) and subject to an AMR in accordance with 10 CFR 54.21(a)(1). If they are excluded from the scope of license renewal and not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.

D-RAI 2.3.3.12-3 The following license renewal boundary drawings show the following fire protection systems/components as not within the scope of license renewal (i.e., not highlighted in green):

LRA Drawing Systems/Components Location LR-DCPP-18-106718-07 Fire protection piping, valves, hose connections, Units 1 and 2 and drains Containment Structure LR-DCPP-18-106718-08 Fire water drains Unit 1 Turbine Building LR-DCPP-18-106718-09 Fire water drains Unit 2 Turbine

Building LR-DCPP-18-106718-11 A portion of the carbon dioxide (CO2) fire A114 and B115 suppression system LR-DCPP-18-106718-16 Fire hose connections FW-3-11-1, FW-3-12-1, FW- Intake Structure 3-13-2, and FW-3-14-2 The staff requests that the applicant verify whether the fire protection systems/components listed above are within the scope of license renewal in accordance with 10 CFR 54.4(a) and whether they are subject to an AMR in accordance with 10 CFR 54.21(a)(1). If they are excluded from the scope of license renewal and are not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.

D-RAI 2.3.3.12-4 License renewal boundary drawing LR-DCPP-18-106718-12 shows Units 1 and 2 CO2 fire hose reels highlighted as within the scope of license renewal for the following areas:

  • Vital 4 kV Bus F, Elevation 119
  • Exciter Field Breaker Room, Elevation 119
  • ISO Phase Bus Room, Elevation 107
  • 4kV Vital Cable Spreading Room, Elevation 107
  • 4 & 12 kV Switchgear Room, Elevation 85 However, FSAR, Section 2.5.1.2.6.1, Low Pressure CO2, states that manually initiated low-pressure CO2 hose reels of 100 foot length are provided only for the following areas:
  • 12 kV Switchgear Rooms
  • 25 kV Potential Transformer Area
  • 480 V Switchgear Room
  • 125 Vdc Battery and Inverter Rooms
  • Electric Load Center Room The staff requests that the applicant clarify this discrepancy.

D-RAI 2.4-1 Section 2.4 of the LRA does not include the following fire barrier and other fire protection components:

  • Table 2.4-11, trash racks and traveling screens The staff requests that the applicant verify whether the above fire barrier assemblies and fire protection components are within the scope of license renewal within the identified structure accordance with 10 CFR 54.4(a) and subject to an AMR in accordance with 10 CFR 54.21(a)(1). If they are excluded from the scope of license renewal and not subject to an AMR, the staff requests that the applicant provide justification for the exclusion.
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