bnpp@nppd.co.ir inbox

From: "Emergency Drill"
To: bnpp@nppd.co.ir
Sent: Thursday, September 20, 2018 12:48:04 AM
Subject: Emergency drill - No action required

THIS IS A DRILL – THIS IS NOT A REAL EVENT – THIS IS A DRILL

NO ACTION REQUIRED

Event Notification Report – Diablo Canyon 1 – Date: 19-09-2018

Anticipated transient without SCRAM (ATWS)

Plant name:

Diablo Canyon

Plant owner:

Pacific Gas & Electric

Unit(s) affected:

Unit 1

Reactor type(s):

PWR

Event date:

19-09-2018

Event time (UTC/local time):

15:44/08:44

What happened:

08:10: Unit 1 had an Anticipated Transient Without SCRAM (ATWS) event. Confirmed Fuel Clad failure based on elevated rad levels at L/D heat exchanger and elevated iodine. Site is in the process of re-evaluating emergency classification. Unit 2 is 100% power with no issues. Reactor coolant leak also in progress

08:37: Site (Unit #1) remains in an Alert (FA1.1 - Loss of fission product barrier). There is NO radioactive release in progress. Bus G is out of service. Unit #2 - is at 100% power with no issues.

08:53: Site has upgraded the event classification to a Site Area Emergency (FS1.1) Loss of any two fission product barriers. Rad Monitors 3&31 are in alarm. Safety Injection (SI) has activated. RCS leak exist. Containment Pressure is 10.1 psig

04:59 EST WANO AC IRC terminated the emergency drill

Reactor status:

Reactor 1 - ATWS

Reactor 2 – On rated power

Consequence(s) of the event:

ATWS leads to fuel damage

Event classification:

On-site emergency

Why this event notification?

You are receiving this event notification report because you are a WANO member and are on the WANO event notification distribution list. This report is classified as Limited Distribution .

Confidentiality notice

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THIS IS A DRILL – THIS IS NOT A REAL EVENT – THIS IS A DRILL

NO ACTION REQUIRED

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--
Sincerely Yours
Rasoul Mahmoudi
Manager of Managing Director Office,
Public Relations & International Affairs

Add: Nuclear Power Plant, Bushehr, Iran
P.O.Box: 75181/111
Tel: +98 77 3111 2585
Fax: +98 77 3111 2710
Personal Email: Mahmoudi@nppd.co.ir