This site uses cookies to offer you a better browsing experience. Find out more on how we use cookies and how you can change your settings.

Nord Pool logo
Nord Pool logo
  • Market data
    • Nord Pool day-ahead
      • Prices
      • Volumes
      • Capacities
      • Flow
    • Nord Pool intraday
      • Market data
      • Volumes
      • Initial capacity
      • Flow
      • Transmission capacity
      • Total scheduled flow
      • Intraday auction DE
      • Indices
      • SEM-GB intraday auction UK
    • Nord Pool UK
      • Prices
      • Block prices
      • Volumes
      • Capacities
      • Flow
      • Exchange rates
      • Index prices
      • Half hourly prices
      • Half hourly block prices
      • Half hourly volumes
    • Regulating power
      • Regulating power per area
      • Regulating prices
      • Regulating volumes
      • Volume of regulating bids
      • Special regulation volume
      • Automatic activated reserve
    • Power system data
      • Production
      • Consumption
      • Exchange
      • Hydro Reservoir
    • Data downloads
      • Historical market data
      • System Price Curve Data
    • Maps
      • Day-ahead overview
  • Trading
    • Join our markets
      • Becoming a customer
      • Membership list
      • Market Managers
    • Operational messages
      • Subscribe
    • Day-ahead trading
      • Order types
      • Price calculation
      • Preliminary prices and exchange rates
      • Capacities
      • Ramping
      • Loss functionality
      • Curtailment, price thresholds and decoupling
      • Day-ahead in Central Europe
    • Intraday trading
      • Order types
      • Capacities
    • Clearing
      • Settlement
      • Collateral
      • Margin model
    • API
      • ISV partners
    • Rules and regulations
    • Market surveillance
      • Newsletter
    • Customer information on Brexit
    • Customers have their say
  • Services
    • Power Data Services
      • Day-Ahead Market Data
      • Intraday Market Data
      • Intraday Operational Data
      • Other products
      • FAQ
      • Inquire and Order
    • Compliance
      • REMIT UMM
      • REMIT transaction reporting service
      • REMIT Best Practice
    • Consulting
      • Recent projects
    • Nord Pool Academy
  • Media
    • Media contacts
      • Press contacts
    • Newsroom
      • News
      • Newsletter
      • Market Surveillance Newsletter
      • TSO news
      • Subscribe
      • Feature
    • Photos
    • Annual report
Media contacts
  • Press contacts
Newsroom
  • News
  • Newsletter
  • Market Surveillance Newsletter
  • TSO news
  • Subscribe
  • Feature
Photos
Annual report
Back to listings
14 September 2006 21:50

No. 52/2006 Necessary measures in Forsmark 1 and 2 for future operations of the plant


Nord Pool has received the following message from SKI (the Swedish Nuclear Power Inspectorate):

A series of measures are demanded before the reactors 1 and 2 at Forsmark nuclear power plant will be permitted to restart. Any risk of failing functions in the safety system due to failures outside the plant must be eliminated and errors similar to the one on July 25th may not cause several safety systems to fail within the plant.

The Swedish Nuclear Inspectorate (SKI) has completed its review and assessment of the incident and has reviewed Forsmark Kraftgrupp AB’s application to restart reactor 1 and 2.

The requirements for the two reactors to restart are:

The battery secured net will be made more durable to high-voltage transients.

The electrical supply from the diesel generators shall be secured

Displays in the control room in the event of loss of electricity must be secured

The gas turbine connected to the plant must be possible to control from the control room.

 Instructions in the control room shall be set by the board.

On July 25 a short circuit in a switchyard outside the power plant caused a failure in the reactor in Forsmark 1. SKI notes that several errors and insufficiencies were present in the plant when the incident occurred. Collectively these errors made the incident complex. The supply of electricity to the safety system did not work as intended according to the plants safety description. When the incident occurred the plant stopped automatically.

The incident did not cause any damage to the reactor. The control room personnel acted according to instructions. Cooling of the reactor was present at all times and any risk of radioactive discharge was never present.

SKI’s assessment is that it was a serious incident as safety systems were needed but did not fully work. Therefore, SKI requires changes in the electricity system at the reactors 1 and 2 making it impossible for the same malfunction to recur. After the required changes have been made SKI have to approve them before the plant is allowed to restart.

Other reactors:Oskarshamns Kraftgrupp (OKG) has not submitted any application to restart its reactor 1.SKI’s assessment about Oskarshamn 2 is that the situation allows the reactor to restart after necessary measures have been made.

Other Swedish reactors do not have any known flaws that cause restrictions of operations. SKI – 2 (2) SKI has also begun a long-term investigation based on the experiences gathered from the incident at reactor 1 in Forsmark. Future measures may therefore be needed in all Swedish reactors.

Documentation, such as a summary of the review report, decision, illustrations etc is available in Swedish and English on SKI’s website: www.ski.se.

Lysaker, 14 September 2006 

For further information, please contact SKI:

Press office, phone: +46 8 698 86 99


Previous message Next message

Choose quarter

{{ group.year }}

  • ({{ period.count }})
Nord Pool logo

    Nord Pool AS

    Tel. +47 6710 9100

    P.O. Box 121

    1325 Lysaker, Norway

Market Data

  • Day-ahead
  • Intraday
  • Regulating power
  • Power system data
  • Data downloads
  • Maps

Trading

  • Join our markets
  • Operational messages
  • Day-ahead trading
  • Intraday trading
  • Clearing
  • API
  • Rules & regulations
  • Market surveillance
  • Customer information on Brexit
  • Customers have their say

Services

  • Premium Data Services
  • Compliance
  • Consulting
  • Nord Pool Academy
  • German mini-site
  • French mini-site

The Power Market

  • Day-ahead market
  • Intraday market
  • CACM regulation
  • Benchmark regulation - Nordic system price
  • Market members
  • Bidding areas

Social media

Quick links

  • UMM
  • Day Ahead Web
  • Intraday Web
  • CASS
  • Intraday and GB Half Hourly auctions

Media

  • Press
  • Newsroom
  • Annual report
  • Download center

About us

  • Careers
  • Advisory board
  • History
  • Organisation
  • Meet our people
  • Corporate Compliance Policy
  • Control cookies
  • COVID-19 Outbreak 2020; Nord Pool Business Continuity Management

Contact us

  • Norway
  • Sweden
  • Finland
  • Estonia
  • UK
  • Germany

© Nord Pool 2020 | Imprint, Data Policy, Legal Notice, How We Treat Personal Data