He said: "You can easily imagine that I can certainly not accept your contention that the Renault team, myself, and your son entered into some sort of conspiracy that would not only have an impact on the result of the competition, but actually that may put at risk the safety of all the contenders in the Grand Prix just to have Fernando Alonso obtaining a racing advantage."
He added: "I am outraged that you could think that I myself, not mentioning your son and the other people in the Renault's team, could have any part in such a strategy that may constitute a criminal offence."
Piquet junior initially said the crash was an accident but made the claims of a conspiracy after he was sacked by Renault in July.
He claimed he went along with the plot because Briatore had put him under "intense stress" and in order to safeguard his place in the team. After the restart, Alonso, who had refuelled just before the "accident", went on to win the race.
The former world champion denies any conspiracy. Briatore had vowed to go to the courts if the matter was made public. The Italian said: "I am forced to consider that your threat constitutes without doubt a blatant attempt of exerting blackmail against Renault F1 and myself to extort an illegitimate advantage by way of threats and outrageous lies on the basis of an alleged hearsay."