PNP 2014-073, Supplemental Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommendations 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

Supplemental Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommendations 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

ML14211A451
Person / Time
Site:	Palisades
Issue date:	07/30/2014
From:	Vitale A Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
PNP 2014-073
Download: ML14211A451 (4)

Text

Entergy Entergy Nuclear Nuclear Operations, Operations, Inc Inc..

Palisades Palisades Nuclear Nuclear Plant Plant 27780 27780 Blue Blue Star Star Memorial Memorial Highway Highway

~ Entergy ru IlL Covert, Covert, MI Tel Ml 49043-9530 49043-9530 269 7642000 Te12697642000 Anthony J.

Anthony J. Vitale Vitale Site Site Vice President President PNP 2014-073 PNP July 30, July 30, 2014 Nuclear Regulatory Commission U. S. Nuclear U.

ATTN: Document Control Desk 11555 Rockville Pike 11555 Rockville, M MD D 20852

SUBJECT:

Supplemental Response to NRC Request Palisades Nuclear Plant Supplemental for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Recommendations 2.3 of the Near-Term Task Force Aspects of Recommendations Review of Insights from the Fukushima Dai-ichi Accident Palisades Nuclear Plant Docket 50-255 License No. DPR-20

REFERENCES:

1. NRC letter, Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1,2.3, Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, dated March 12, 12, 2012 (Adams Accession No. ML 12056A046)

ML12056A046)

2. Entergy Nuclear Operations, Inc. letter, PNP 2012-101, Flooding Walkdown Report - Response to NRC Request for

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Information Pursuant to 10 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommend Recommendation ation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, dated November 27, 2012 (Adams Accession No.

27,2012 No.

ML1 2332A377)

ML12332A377)

Dear SirSir or or Madam:

Madam:

On March March 12, 2012, the NRC 12, 2012, issued Reference 11 to all NRC issued all power power reactor licensees.

licensees. of Reference 1 of Reference 1 requestedrequested that each each licensee licensee perform perform flood flood protection protection walkdowns walkdowns and and report report the results within 180 days within 180 days ofof NRC NRC endorsement of the the flooding walkdown walkdown procedure (NEI (NEI 12-07, 12-07, Guidelines "Guidelines for Performing Verification Walkdowns Walkdowns of of Plant Plant Flood Flood Protection Protection Features).

Features"). Entergy Entergy Nuclear Nuclear Operations, Operations, Inc. Inc. (ENO)

(ENO) completed completed the the flood flood protection protection walkdowns walkdowns at at the the Palisades Palisades Nuclear Nuclear Plant Plant and and submitted submitted the the results results in in Reference Reference 2. 2. Reference Reference 22 contained openopen items items where restricted access access prevented prevented walkdown walkdown of of certain certain flood flood protection protection features. Walkdowns Walkdowns of of the the restricted restricted access access

PNP 2014-073 Page 2 of 2 items were completed by June 1,2014, 1, 2014, as committed, and this letter provides provides the results. This submittal closes the open items in Reference 2.

The attached table provides a list of the restricted access items inspected, their respective disposition, and any action planned or taken. As a result of the inspections:

• There were no additional deficiencies found in the supplemental walkdowns.

• No temporary measures were required as a result of the completed inspections.

• Available Physical Margin information was collected and documented in the walkdown record forms for each applicable item inspected in accordance with NEI 12-07.

NEI12-07.

• One of the restricted access items was reclassified as Inaccessible.

Summary of Commitments This letter contains no new or revised commitments. It completes the following commitment made in Reference 2:

ENO will perform walkdowns for equipment that could not be inspected as "ENO identified in Section 7.4 of the Flooding Walkdown Submittal Report."

Report.

This commitment was a one-time action with a scheduled completion date of June 1, 2014.

II declare under penalty of perjury that the foregoing is true and correct. Executed on July 30, 2014.

Sincerely, ajv/jse

Attachment:

Flooding Walkdown Report Open Items cc: Director of Office of Nuclear Regulation Administrator, Region Ill, III, USNRC Project Manager, Palisades, USN RC Resident Inspector, Inspector, Palisades, USN USNRCRC

Attachment Attachment Flooding Walkdown Flooding Walkdown Report Report Open Open Items Items Follows One Page Follows

Flooding Walkdown Flooding Walkdown Report Report Open Open Items Items Description of Description of Feature Feature Deficiency?

Deficiency? Deficiency Deficiency Taken Actions Taken Inaccessible?

Inaccessible?

(yes/no)

(yes/no) Description Description Planned or Planned (yes/no, ifif yes, explain (yes/no, explain below) below)

Diesel Generator Diesel Generator 1-1 Floor Drain 1-1 Floor Drain No None None None None No No Backwater Valve Backwater Valve Diesel Generator Diesel Generator 1-21-2 Floor Floor Drain Drain No None None No Backwater Valve Backwater Valve Electrical conduit Electrical conduit A026 A026 sealseal in in No None None Yes Manhole #3 Manhole within 11 C

1. 3 within switchgear C switchgear room. This room. This conduit conduit feeds feeds the the The conduit seal is located deep into the motor driven motor driven auxiliary auxiliary feedwater feedwater conduit and could not be visually inspected pump in pump in the the auxiliary auxiliary feedwater feedwater or inspected with a boroscope. Inspection pump room.

pump room. would require removal of power cables for auxiliary feedwater pump P-8A within the conduit and significant disassembly of the

-- - "-----.

conduit. See evaluation below.

Evaluation Evaluation of of Electrical Electrical Conduit A026 NEI NEI 12-07, 12-07, Guidelines "Guidelines for Performing Verification Walkdowns of Plant Plant Flood Protection Features, Features," requires in Section 5.1 that inaccessible inaccessible items items shall shall be be identified identified and and justification provided that there there is is reasonable assurance that the feature is is available and will perform the external perform the external flood flood protection or mitigation or mitigation function for the full duration ofof the flood condition.

The The evaluation evaluation of of the the inaccessible inaccessible electrical electrical conduit conduit A026 A026 included included aa review review of of plant plant documentatio documentation n for this this seal seal which which verified verified that that the the seal is installed and properly seal is installed and properly designed.designed. The The evaluation evaluation concluded concluded that that there there is is reasonable reasonable assurance assurance that that the the seal seal is is available available and and will perform perform its its external external flood flood mitigation mitigation function function for for the the full full duration duration of of the the flood flood condition.

condition.