ML12012A153

E-mail from Jacob Wingebach to Jeff Clark, Subject: Additional Flooding Penetrations and Tsf Nonfunctionality

ML12012A153
Person / Time
Site:	Fort Calhoun
Issue date:	04/08/2011
From:	Wingebach J NRC/RGN-IV/DRP
To:	Clark J NRC/NSIR/DSO/DDSO/SPEB
References
FOIA/PA-2011-0339
Download: ML12012A153 (3)

Text

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From: Win aebach, Jacob To: Clark, Jeff Cc: Azu., Ray; Smith, Chris; Melfi. Jim

Subject:

Additional flooding penetrations and TSF nonfunctionality Date: Friday, April 08, 2011 1:03:40 PM Attachments: 361 for CR2011-2472 2448 CARP flood.Pdf 361-CR 2011-2654 TSC nonfunctionalodf From: MATZKE, ERICK P [1]

Sent: Friday, April 08, 2011 12:50 PM To: SANDHOEFNER, MICHAEL J; BURKHART, AMY K; Kirkland, John; Wingebach, Jacob; BAUGHN, SUSAN E; GUINN, DONNA K Cc: NELLENBACH, TIMOTHY R; HANSON, JEFFREY J; JONES, MICHAEL R; GOODELL, JOHN R; HERMAN, JOHN B; BANNISTER, DAVID J; REINHART, JEFFREY A

Subject:

Additional flooding penetrations and TSF nonfunctionality Here is the completed event notification worksheets.

Erick Matzke Fort Calhoun Station FC-2-4 402-533-6855 1,7NAVY~

PAGE 1 OF 2 NRC FORM 361 U.S. NUCLEAR REGULATORY COMMISSION (12-2000) REACTOR PLANT OPERATIONS CENTER EVENT NOTIFICATION WORKSHEET EN# 46741 O'Hara NRC OPERATION TELEPHONE NUMBER: PRIMARY - 301-816-5100 or 800-532-3469*, BACKUPS - [1st] 301-951-0550 or 800-449-3694",

"g-n 'A]Q1~-A'l r-r~irg% n- *rl FqA K.*4 -1 ;ra a xak. i #ý! tk=*ir ~, - r ::T *r- -;A-i4* fk~=- aah 4.1, k n- r NOTIRCATION TlME FAC-I1ITY OR CR"-ANI7AT'NkI UNIT NAME OF ALLER I CALL BACK #

1240 CDT Ft. Calhoun Station = 1IErick Matzke - j [402-533-6855 EVENT TIME &ZONE "NT DATE FB POWER/MODE AFTER 1024 CDT 04/08/2011 1 1 EVENT CLASSIFICATIONS 1-Hr. Non-Emergency 10 CFR 50.72(b)(1) [ *v)(A) Safe SID Capability AINA GENERAL EMERGENCY' GEN/AAEC TSIDavtison ADEV r-(v)() RHR Capability AINB SITE AEA ERGENCY SIT/AAEC 4-Hr. Non-Emermency 10 CFR 50.72(b)(2) (v)(C) Control of Rad Release AJNC 71ALERT ALE/MAEC Wi TS Required SOD AU jv)(D) Accident Mitigation AND)

UMJSUAL EVENT ULNUAAEC iv)(A) ECCS Discharge to RCS ACCS (xii) Offsite Medical AvED

/50.72 NON-EMERGENCY (see next columns) (iv)(B) RPS Actuation (scram) ARPS LI(xiii) Loss Comm/Asmt/Resp

- PHYSICAL SECURITY (73.71) xid) Offsite Notiftcation ARIE 60-Day Optional 10 CFR 50.73(a)(1)

MAT LPOSURE B??? 8-Hr. Non-Emergency 10 CFR 50.72(b)(3) Ij Invalid Specified System Actuation AINV FITNESS FOR DUTY HRT (ii)(A) Degraded Condition ADEG Other Unspecified Requirement (Identify)

OTHER UNSPECIFIED REQMT. (see last column) (iiXB) Unanalyzed Condition AUNA -1 ["

INFORMATION ONLY NWWF- iv)(A) Specified System Actuation AESF DESCRIPTION Include: Systems affected, actuations and their initiating signals, causes, effect of event on plant, actions taken or planned, etc. (Continue on back)

During investigations of flood barrier penetrations, one approximately 4 inch conduit has been identified that is not sealed. Reducers are installed in the conduit on the exterior side. This conduit penetrates the auxiliary building into room 56. Flooding through the penetrations could have impacted the ability of the station's safety related equipment in the auxiliary building to perform their design accident mitigation functions.

During investigations of flood barrier penetrations, a drain flow path from the CARP building into Room 23 of the Auxiliary Building. There is no specific procedural guidance to isolate this flow path in the event of a flood above 1007 feet. Flooding through this flow path could have impacted the ability of the station's safety related equipment to perform their design accident mitigation functions.

This eight-hour notification is being made pursuant to 10 CFR 50.72 (b) (3) (v) (D).

The penetrations and CARP building drains are at an approximate elevation of 1007'. The river level has been less than 997 feet Mean Sea Level (MSL) since prior to December 1, 2010. The safety related equipment is currently operable. There are not any indications of conditions that might result in a flood. Compensatory actions have been identified.

NOTIFICATIONS YES NO WILL BE ANYTHING UNUSUAL OR E] , . , , uC NRC RESIDENT I/ NOT UNDERSTOOD? YSEliae STATE(s) -/ r,. _P CLoSYSTEMS E NOU(Explain abLY OTHER GOV AGENCIES - MODE OF OPERATION ESTIMATED ADDITIONAL INFO ON BACK MEDIA/PRESS RELEASE UNTIL CORRECTED: 1

• RESTART DATE: n/a [J YES j NO NRC FORM 361 (12-2000) PRINTED ON RECYCL'ED PAPER

PAGE 1 OF 2 NRC FORM 361 U.S. NUCLEAR REGULATORY COMMISSION (12-2000) REACTOR PLANT OPERATIONS CENTER EVENT NOTIFICATION WORKSHEET EN# 46742 O'Hara NRC OPERATION TELEPHONE NUMBER: PRIMARY - 301-816-5100 or 800-532-3469*, BACKUPS - [1st] 301-951-0550 or 800-449-3694",

r2ndl 301-415-0550 and [3rdl 301-415-0553 *Licensees who maintain their own ETS are provided these telephone numbers.

[

NOTIFICATION TIME FACII OR OANI7A ITY UNIT NAM: OF CALIFR I.I CALL BACK #

1244 CDT Ft. Calhoun Station I =

3. 1!

]Erick Matzke 402-533-6855 EVENT TIME AZONE 4 AEPWROEBFR POWERVIMODE AFTER F 07627 CDT 040/011 l, F 10ý1 EVENT CLASSIFICATIONS 1-Hr. Non-Emergency 10 CFR 50.72(b)(1) E jv)(A) Safe S/D Capability AINA GENERAL EMERGENCY GEN/AAEC _ TS Deviation ADEV (v)(B) RHR Capability AINB I- SrrE AREA EMERGENCY SIT/AAEC 4-Hr. Non-Emergency 10 CFR 50.72(b)(2) (v)(C) Controlof Red Release AINC ALERT ALFJAAEC M (i) TS Required S/D ASHU - Iv)(D) Accident Mitigation A)ND UNUSUAL EVENT UNJ/AAEC . iv)(A) ECCS Discharge to RCS ACCS (xii) Offsite Medical AMED 17 50.72 NON-EMERGENCY (see next columns) 1 (iv)(B) RPS Actuation (scram) ARPS /[(xiii) Loss Comm/Asmt/Resp ACOM PHYSICAL SECURITY (73.71) 1)D0D xi) Offsite Notification AJRE 60-Day Optional 10 CFR 50.73(a)(1) iRE MARi B 8-Hr. Non-Emergency 10 CFR 50.72 b(3 Invalid Specified System Actuation AIMV FITNESS FOR DUTY HFIT (ii)(A) Degraded Condition ADEG Other Unspecified Requirement (Identify)

OTHER UNSPECIFIED RECIMT. (see last column) (ii)(B) Unanalyzed Condition AUNA ._ _

INFORMATION ONLY NHF (iv)(A) Specified System Actuation AESF £ DESCRIPTION Include: Systems affected, actuations end their initiating signals, causes, effect of event on plant, actions taken or planned, etc. (Continue on back)

Technical Support Center (TSC) was non-functional due to inability to maintain pressure boundary for function of the TSC HVAC system. This morning the latch to one of the doors to the TSC was discovered broken. The door would not latch shut. The station has repaired the door. Compensatory measures were in place for the nonfunctional facility.

The TSC is now functional.

NOTIFICATIONS YES NO WILL BE ANYTHING UNUSUA Explain-ab...

. . .O NRC RESIDENT NOT N UNDERSTO  ?

?] Explain above) NO STATE(s) - ID ALL Sy EMIVS El YES flNO (Expai above)

LOCAL ____ FUNCS AS REQUIRED?

OTHER GOV AGENCICS __ MODE OF OPERATION ESTIMATED ADOITIONAL INFO ON BACK MEDIA/PRESS RELEA§E / IUTIL CORRECTED: 1 RESTART DATE: n/a [ YES ONO NRC FORM 361 (12-2000) PRINTED ON RECYCLED PAPER